15 Best USB 3.1 USB Flash Drives, Compared
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Finding the best USB 3 1 USB flash drives requires looking at published specifications rather than marketing claims. We compared 15 models to help you choose based on data. The Amazon Basics 256GB USB 3.1 Retractable Flash Drive leads this list because it offers 130MB/s read speeds and a capless design for everyday use. All selections rely strictly on specs like transfer rates, connector types, and physical dimensions found on product listings. This guide helps you decide which drive fits your storage needs and device compatibility.
Quick picks
The best fit for you
- You need capless everyday file storage Amazon Basics 256GB USB 3.1 Retractable Flash Drive Its 130MB/s read speed and retractable design suit daily use.
- You require certified hardware encryption Apricorn Aegis Secure Key 3NX Encrypted Drive It includes 256-bit AES encryption and FIPS 140-2 Level 3 validation.
- You want to swap files between phones SanDisk 32GB Ultra Dual Drive USB-C Its USB-C connector and 150MB/s read speed bridge mobile and desktop devices.
- You need durable metal casing for carry Samsung BAR Plus 128GB USB 3.1 Flash Drive The all-metal housing and 400MB/s read speed provide resilient everyday storage.
- You want low-profile storage for laptops PNY Elite-X Fit 128GB Low-Profile USB Drive Its micro-sized footprint and 200MB/s read speed fit unobtrusively in ports.
Our 15 picks
Amazon Basics 256GB USB 3.1 Retractable Flash Drive
Best for: everyday capless file transfers and storage
- USB Version
- USB 3.1 (what this guide is about)
- Storage Capacity
- 256 GB
- Read Speed
- Up to 130MB/s
- Dimensions
- 2.24 × 0.79 × 0.53 inches
- Weight
- 0.32 ounces
View on Amazon: Amazon Basics 256GB USB 3.1 Retractable Flash Drive
The Amazon Basics 256GB USB 3.1 Retractable Flash Drive gives you high-capacity external storage with read speeds reaching up to 130MB/s and write speeds up to 30MB/s. It features a capless, telescopic sliding design with a built-in key hole for transport. This drive suits you if you need a straightforward, high-capacity USB-A storage solution for holding photos, videos, and general files across Windows and Mac systems without keeping track of a removable cap.
Pros
- Read speeds reach up to 130MB/s on USB 3.1 and USB 3.0 ports
- Retractable telescopic mechanism protects connector without a cap
- Integrated key hole for lanyard or keyring attachment
- 256GB capacity provides over 230GB of usable storage
Cons
- No integrated LED status light indicator
- Factory default FAT32 format requires reformatting for files over 4GB
- Write speed is limited up to 30MB/s
Good fit if
- You want a capless sliding connector with an integrated key hole.
- You need 256GB of portable storage for files under 4GB right out of the box.
- You use devices equipped with standard USB 3.1 or USB 3.0 Type-A ports.
Skip if
- You require an integrated LED indicator to visually confirm active file transfers.
- You transfer single files over 4GB and do not want to reformat from FAT32.
- You need write performance faster than 30MB/s.
Verdict: Amazon Basics 256GB USB 3.1 Retractable Flash Drive delivers solid 130MB/s read transfers and a capless sliding design for dependable daily file storage. It is a practical everyday choice if you do not mind the 30MB/s write limit and lack of an activity LED.
Apricorn Aegis Secure Key 3NX Encrypted Drive
Best for: hardware-encrypted USB 3.1 data security
- USB Version
- USB 3.1 (what this guide is about)
- Security Standard
- 256-Bit AES XTS, FIPS 140-2 Level 3
- Pack Quantity
- 1
- Security Features
- 256-Bit AES Encryption, FIPS 140-2 Level 3
View on Amazon: Apricorn Aegis Secure Key 3NX Encrypted Drive
The Apricorn Aegis Secure Key 3NX Encrypted Flash Drive is a black USB 3.1 storage device designed for hardware-level data protection. It provides software-free 256-bit AES XTS encryption along with FIPS 140-2 Level 3 security validation. This unit is professionally inspected and cleaned as a pre-owned drive. You should choose this drive if you handle sensitive files and need secure, validated encryption across standard USB 3.1 ports without installing third-party management software.
Pros
- 256-bit AES XTS hardware encryption
- FIPS 140-2 Level 3 security certification
- USB 3.1 interface
- Software-free operation
Cons
- Sold as a pre-owned product rather than factory-new
- Read and write transfer speeds not listed in specifications
Good fit if
- You require FIPS 140-2 Level 3 validated security for stored files.
- You want 256-bit AES encryption that operates without host software.
- You need a USB 3.1 flash drive in a black casing.
Skip if
- You prefer purchasing a brand-new drive rather than a pre-owned model.
- You need verified read and write speed ratings before buying.
Verdict: Apricorn Aegis Secure Key 3NX Encrypted Flash Drive delivers hardware-level 256-bit AES encryption and FIPS 140-2 Level 3 validation over a USB 3.1 interface. It is a solid pick if you need certified data security on a portable drive.
SanDisk 32GB Ultra Dual Drive USB-C
Best for: swapping files between phone and computer
- USB Version
- USB 3.1 (what this guide is about)
- Storage Capacity
- 32GB
- Connector Type
- USB-C, traditional USB
- Read Speed
- Up to 150MB/s
- Features
- OTG Dual Drive
- Dimensions
- 0.37 × 1.5 × 0.79 inches
The SanDisk 32GB Ultra Dual Drive USB-C is a compact flash drive built with both USB Type-C and traditional USB Type-A connectors. It operates on the USB 3.1 interface and delivers read speeds up to 150MB/s. Its retractable design protects both plugs without separate caps. This drive suits you if you frequently move files between modern USB-C mobile devices and standard USB-A computers.
Pros
- Dual USB Type-C and traditional USB Type-A connectors
- Read speeds up to 150MB/s over USB 3.1
- Retractable design shields connectors without loose caps
- Lightweight 0.02-pound casing
Cons
- Write speed is not specified in the official specs
- Requires USB-C host device with OTG support for mobile use
Good fit if
- You need to swap data between USB-C smartphones and standard USB-A PCs.
- You want a retractable dual-interface drive that avoids losing caps.
- You only need 32GB of storage for everyday documents and light media.
Skip if
- You need massive capacity beyond 32GB for large 4K video backups.
- You use a mobile device lacking USB-C or OTG functionality.
Verdict: SanDisk 32GB Ultra Dual Drive USB-C gives you convenient cross-device transfers between USB-A and USB-C hardware at up to 150MB/s read speeds. It is a practical, pocket-sized bridge for basic daily storage tasks.
PNY Elite-X Fit 128GB Low-Profile USB Drive
Best for: plug-and-stay storage on laptops and car stereos
- USB Version
- USB 3.1 (what this guide is about)
- Storage Capacity
- 128GB
- Read Speed
- Up to 200MB/s
- Dimensions
- 0.83 × 0.6 × 0.25 inches
- Weight
- 0.49 ounces
The PNY Elite-X Fit 128GB Flash Drive is a low-profile USB 3.1 Gen 1 storage device built for semi-permanent installation. Measuring 0.83 inches long and 0.25 inches high, it stays plugged into laptops, game consoles, or car stereos without getting in the way. It delivers read speeds up to 200MB/s and remains backward compatible with USB 2.0 ports. This drive suits you if you need compact, unobtrusive storage expansion.
Pros
- Read speeds up to 200MB/s
- Low-profile dimensions at 0.83 by 0.6 by 0.25 inches
- Backward compatible with USB 2.0 ports
- Plug-and-stay design stays connected to host devices
Cons
- Write speed is not specified in the product data
- Small dimensions make it easier to misplace when unplugged
- No USB Type-C connector included
Good fit if
- You need a low-profile drive to leave connected to a laptop, car stereo, or game console.
- You want read speeds up to 200MB/s over USB 3.1 Gen 1.
- You require compatibility with legacy USB 2.0 hardware.
Skip if
- You need a direct USB Type-C connection for phones or newer tablets.
- You require verified write speeds before purchasing.
Verdict: PNY Elite-X Fit 128GB Flash Drive offers a micro-sized footprint and read speeds up to 200MB/s for unobtrusive storage. Its low-profile build makes it practical to leave connected to laptops, vehicle sound systems, and consoles.
Samsung BAR Plus 128GB USB 3.1 Flash Drive
Best for: durable metal everyday carry storage
- USB Version
- USB 3.1 (what this guide is about)
- Storage Capacity
- 128GB
- Read Speed
- 400MB/s
- Features
- Metal Casing
- Dimensions
- 1.58 × 0.61 × 0.47 inches
The Samsung BAR Plus is a USB 3.1 flash drive built with 128 GB of storage and a rugged metal casing. It delivers read speeds up to 400MB/s for transferring photos and video files. The housing includes an integrated keyring and offers waterproof, shock-proof, temperature-proof, magnet-proof, and X-ray-proof protection. You get a five-year limited warranty suited for daily portable storage.
Pros
- Read speeds up to 400MB/s
- Rugged metal casing with integrated keyring
- Waterproof, shock-proof, magnet-proof, temperature-proof, and X-ray-proof body
- 5-year limited warranty
Cons
- Write speed is not specified in attributes
- No secondary USB Type-C connector listed
Good fit if
- You need a sturdy metal flash drive with an integrated keyring hole.
- You prioritize fast read throughput up to 400MB/s on USB 3.1.
- You require hardware-level resistance against water, drops, magnets, and X-rays.
Skip if
- You need verified write speed metrics provided in the specifications.
- You require a native USB Type-C port for mobile devices.
Verdict: Samsung BAR Plus 128GB Metal USB 3.1 Flash Drive delivers fast 400MB/s read performance inside a durable all-metal housing. It provides resilient physical protection backed by a 5-year limited warranty.
Samsung Bar Plus 128GB USB 3.1 Flash Drive
Best for: compact everyday USB 3.1 file storage
- USB Version
- USB 3.1 (what this guide is about)
- Storage Capacity
- 128GB
- Dimensions
- 1.57 × 0.61 × 0.46 inches
- Weight
- 0.35 ounces
The Samsung Bar Plus is a USB 3.1 flash drive providing 128GB of storage capacity. It measures 1.57 inches long, 0.61 inches wide, and 0.46 inches high, while weighing just 0.35 ounces. The white exterior provides a compact footprint for easy travel. This unit suits you if you need 128GB of USB 3.1 data storage in a pocket-sized build.
Pros
- 128GB storage capacity
- USB 3.1 specification
- Lightweight build at 0.35 ounces
- Compact dimensions of 1.57 by 0.61 by 0.46 inches
Cons
- No read or write transfer speeds listed in specifications
- No USB Type-C connector specified
Good fit if
- You need 128GB of storage using a USB 3.1 interface.
- You want a compact drive that weighs only 0.35 ounces.
Skip if
- You require published read and write transfer rates before choosing a drive.
- You need native USB Type-C connectivity for your devices.
Verdict: Samsung Bar Plus 128GB USB 3.1 Flash Drive delivers 128GB of portable storage in a 0.35-ounce white housing. It serves as a straightforward USB 3.1 solution when you need compact everyday storage without excess bulk.
Samsung BAR Plus 64GB USB 3.1 Flash Drive
Best for: Durable everyday USB-A file transfers
- USB Version
- USB 3.1 (what this guide is about)
- Storage Capacity
- 64 GB
- Connector Type
- Type-A
- Read Speed
- 200MB/s
- Size
- 64GB
- Dimensions
- 1.57 × 0.61 × 0.46 inches
The Samsung BAR Plus 64GB is a compact USB 3.1 Type-A flash drive built with a unibody metal casing and an integrated key ring. It delivers up to 200MB/s read speeds and 30MB/s write speeds, moving files quickly to your PC or notebook. If you need a rugged, portable drive for daily backups, documents, or media without needing USB-C connectivity, this drive fits your keychain easily.
Pros
- Read speeds reach up to 200MB/s over USB 3.1
- Durable champagne silver unibody metal housing with key ring
- Five-way protection against water, shocks, magnets, temperature, and X-rays
- Backward compatible with USB 3.0 and USB 2.0 ports
Cons
- Write speed is limited to 30MB/s
- Uses a standard USB-A connector without native USB-C support
- 64GB capacity offers less room than higher-tier sizes
Good fit if
- You need a rugged USB-A flash drive with an integrated key ring.
- You prioritize read speeds up to 200MB/s for transferring files to a PC.
- You want physical protection against water, drops, magnets, and extreme temperatures.
Skip if
- You need a native USB-C plug for smartphones or modern laptops.
- You require write speeds faster than 30MB/s for saving large files.
Verdict: Samsung BAR Plus 64GB USB 3.1 Flash Drive provides durable metal storage and dependable 200MB/s read speeds for everyday PC use. Its 30MB/s write speed and USB-A connector keep it practical for standard file transfers rather than heavy data writing.
SanDisk Ultra Luxe 32GB USB 3.1
Best for: Users wanting metal durability and recovery tools
- USB Version
- USB 3.1 (what this guide is about)
- Storage Capacity
- 32GB
- Connector Type
- USB-A
- Read Speed
- 150MB/s
- Pack Quantity
- 1
- Dimensions
- 1.57 × 0.62 × 0.23 inches
The SanDisk Ultra Luxe offers 32GB of storage in a compact, full-cast metal body. It supports USB 3.1 Gen 1 with read speeds up to 150MB/s. This drive includes RescuePRO Deluxe software for file recovery. You will appreciate its durable build and fast transfer rates for everyday files. It suits users who need reliable, portable storage in a small form factor.
Pros
- Full cast metal design for durability
- USB 3.1 Gen 1 interface
- Read speeds up to 150MB/s
- Includes RescuePRO Deluxe recovery software
Cons
- 32GB capacity is lower than many competitors
- Only includes one drive per pack
- No USB Type-C connector option listed
Good fit if
- You need a durable, metal-bodied drive
- You require basic file recovery software
- You prefer a compact USB 3.1 drive
Skip if
- You need high-capacity storage above 32GB
- You require USB Type-C connectivity
- You want bulk packs of multiple drives
Verdict: SanDisk 32GB Ultra Luxe USB 3.1 is a solid choice for users prioritizing build quality and recovery software over raw capacity. It fits those who value a metal enclosure and standard USB 3.1 speeds for daily tasks.
SanDisk 128GB Ultra Luxe USB 3.1 Flash Drive
Best for: everyday metal-cased USB 3.1 file transfers
- USB Version
- USB 3.1 (what this guide is about)
- Storage Capacity
- 128GB
- Read Speed
- Up to 150MB/s
- Dimensions
- 0.23 × 1.57 × 0.62 inches
View on Amazon: SanDisk 128GB Ultra Luxe USB 3.1 Flash Drive
The SanDisk Ultra Luxe is a USB 3.1 Gen 1 flash drive that provides 128GB of storage inside a full cast metal body. It delivers read speeds reaching up to 150MB/s, letting you move files quickly through standard USB ports. It also includes access to downloadable RescuePRO Deluxe file recovery software. This drive suits you if you want durable metal protection and balanced 150MB/s transfer performance.
Pros
- Read speeds reach up to 150MB/s over USB 3.1 Gen 1
- Full cast metal casing provides physical protection
- Includes downloadable RescuePRO Deluxe recovery software
- Compact dimensions measuring 1.57 by 0.62 by 0.23 inches
Cons
- Read speed capped at 150MB/s rather than 400MB/s options
- Lacks a secondary USB Type-C connector
Good fit if
- You need a 128GB USB 3.1 drive built with a full metal exterior.
- You want 150MB/s read speeds for routine file transfers.
- You value included file recovery software access.
Skip if
- You need transfer speeds exceeding 150MB/s.
- You require a direct USB Type-C connection for your hardware.
Verdict: SanDisk Ultra Luxe 128GB USB 3.1 Flash Drive delivers dependable 150MB/s read speeds inside a sturdy cast metal housing. It gives you reliable USB 3.1 storage with bundled data recovery software.
SanDisk Ultra Dual Drive Luxe 256GB USB-C
Best for: Transferring large files between USB-C phones and PCs
- USB Version
- USB 3.1 (what this guide is about)
- Storage Capacity
- 256GB
- Connector Type
- USB-A, USB-C
- Read Speed
- 150 MB/s
- Pack Quantity
- 1
- Compatible Device
- PC, Tablets
This 256GB USB 3.1 Gen 1 drive features a dual USB-A and USB-C connector design with a swivel metal casing. It supports On-The-Go (OTG) transfers between smartphones, tablets, and computers. Read speeds reach up to 150 MB/s. The included lanyard adds portability. It suits users needing high capacity and cross-device compatibility for media files.
Pros
- 256GB storage capacity
- Dual USB-A and USB-C connectors
- USB 3.1 Gen 1 interface
- Up to 150 MB/s read speed
- Swivel metal casing design
Cons
- 150 MB/s read speed is slower than 400 MB/s competitors
- Write speed not specified in data
- No included cap due to swivel design
Good fit if
- You need to transfer files between a USB-C phone and a standard USB-A computer
- You require 256GB of storage for large media libraries
- You prefer a durable metal build without a loose cap
Skip if
- You need maximum transfer speeds exceeding 150 MB/s
- You only use devices with USB-C ports and do not need USB-A
- You want a drive with a specified high write speed
Verdict: SanDisk Ultra Dual Drive Luxe 256GB USB-C is a solid choice for users who frequently switch between USB-C mobile devices and traditional computers. It offers ample space and convenient connectivity, though it lacks the top-tier speeds found on some rivals.
SanDisk Ultra Dual Drive Luxe 32GB 5-Pack
Best for: bulk multi-device file transfers
- USB Version
- USB 3.1 (what this guide is about)
- Storage Capacity
- 32GB
- Connector Type
- USB Type-A, USB-C
- Read Speed
- up to 150 MB/s
- Pack Quantity
- 5
- Compatible Device
- PC, Tablets
This bundle provides five 32GB SanDisk Ultra Dual Drive Luxe flash drives and a lanyard. Each drive features USB 3.1 Gen 1 transfer speeds reaching up to 150 MB/s. With both USB Type-A and USB Type-C connectors on a metal swivel housing, you can switch between modern phones and standard computers without adapters. It suits you if you need multiple portable storage drives for basic file transfers across mixed devices.
Pros
- Dual USB Type-C and USB Type-A connectors
- USB 3.1 Gen 1 transfer speeds up to 150 MB/s
- Includes five 32GB drives and one lanyard
- All-metal swivel housing with keyring loop
Cons
- Small 32GB capacity per individual drive
- Bundle includes only one lanyard for five drives
Good fit if
- You need multiple flash drives to distribute or organize smaller files.
- You frequently transfer data between USB-A computers and USB-C mobile devices.
- You want metal flash drives with built-in swivel covers instead of loose caps.
Skip if
- You require more than 32GB of storage capacity on a single flash drive.
- You need dedicated protective caps over both USB connectors simultaneously.
Verdict: SanDisk Ultra Dual Drive Luxe 32GB 5-Pack delivers dual-connector versatility and metal durability across multiple drives. Its 150 MB/s USB 3.1 Gen 1 speed and paired USB-A and USB-C plugs make it a practical multi-device solution.
SanDisk Ultra Dual Drive Luxe 64GB 5-Pack
Best for: multi-device file sharing across several drives
- USB Version
- USB 3.1 (what this guide is about)
- Storage Capacity
- 64GB
- Connector Type
- USB Type-A, USB-C
- Read Speed
- up to 150 MB/s
- Pack Quantity
- 5
- Compatible Device
- PC, Tablets
This bundle includes five 64GB SanDisk Ultra Dual Drive Luxe flash drives and two lanyards. Each drive features USB 3.1 Gen 1 transfer speeds up to 150 MB/s alongside dual USB Type-A and USB Type-C connectors. The metal swivel design covers the connectors and attaches to keyrings. This setup suits you if you need multiple shared drives to move files between USB-C phones, tablets, and standard Type-A computers.
Pros
- Dual USB Type-A and USB-C connectors for broad compatibility
- Transfer speeds reach up to 150 MB/s via USB 3.1 Gen 1
- Metal casing with a capless swivel housing
- Includes five 64GB flash drives and two lanyards
Cons
- 64GB capacity per drive limits single-volume large storage
- Bundle comes with only two lanyards for five drives
Good fit if
- You need multiple flash drives to distribute data across separate devices.
- You frequently transfer files between USB-A computers and USB-C phones or tablets.
Skip if
- You require a single high-capacity drive rather than multiple 64GB units.
- You want transfer speeds exceeding 150 MB/s.
Verdict: SanDisk 64GB Ultra Dual Drive Luxe 5-Pack delivers convenient multi-device data movement across five all-metal dual-connector flash drives. It is a practical option when you need standard USB-A and USB-C connectivity across several separate drives.
SanDisk Ultra Dual Drive Go 128GB USB Flash Drive
Best for: transferring files across USB-A and USB-C devices
- USB Version
- USB 3.1 (what this guide is about)
- Storage Capacity
- 128GB
- Connector Type
- USB Type A & Type-C
- Read Speed
- up to 150 MB/s
- Pack Quantity
- 1
- Compatible Device
- PC, Tablets
View on Amazon: SanDisk Ultra Dual Drive Go 128GB USB Flash Drive
This 128GB flash drive provides both USB Type-A and USB-C connectors on a single body, operating on the USB 3.1 standard. It delivers transfer speeds up to 150 MB/s for compatible devices. A swivel design protects the ports without separate caps, and a lanyard comes included. You will find it suits moving files between modern phones, tablets, and traditional computers.
Pros
- Dual USB Type-A and USB-C connectors
- Transfer speeds reach up to 150 MB/s
- Swivel mechanism protects connectors without a loose cap
- Includes a lanyard and attachment loop
Cons
- Write speeds are not specified in the ratings
- Swivel housing leaves one connector exposed at all times
Good fit if
- You need to move data between USB-A and USB-C hardware.
- You want a capless swivel housing with an included lanyard.
- You use OTG-compatible smartphones or tablets alongside PCs.
Skip if
- You require hardware-based encryption on your storage drive.
- You need a drive with fully enclosed, sealed port protection.
Verdict: SanDisk Ultra Dual Drive Go 128GB USB-C Flash Drive bridges USB-A and USB-C hardware with USB 3.1 read speeds reaching 150 MB/s. Its dual-interface swivel casing makes it a straightforward choice for moving files across phones, tablets, and computers.
SanDisk Ultra Fit 128GB USB 3.1 (5-Pack)
Best for: equipping multiple devices with low-profile storage
- USB Version
- USB 3.1 (what this guide is about)
- Storage Capacity
- 128GB
- Read Speed
- Up to 130MB/s
- Pack Quantity
- 5
- Dimensions
- 1.17 × 0.56 × 0.2 inches
This five-pack gives you five compact SanDisk Ultra Fit USB 3.1 flash drives with 128GB of storage each. Every drive measures 1.17 inches long and 0.2 inches thick, making them low-profile options you can leave plugged into laptops, game consoles, or audio setups. You get read speeds up to 130MB/s and a five-year manufacturer warranty. It suits you if you need multiple small drives for separate storage tasks.
Pros
- Five 128GB USB 3.1 flash drives included
- Read speeds up to 130MB/s
- Compact plug-and-stay profile measuring 0.2 inches high
- Five-year limited manufacturer warranty
Cons
- Read speed capped at 130MB/s rather than 400MB/s
- No USB Type-C connector included
Good fit if
- You need multiple dedicated drives to distribute across laptops, consoles, or car audio systems.
- You prefer a compact plug-and-stay profile that measures 1.17 inches long.
- You want a five-year manufacturer warranty across several drives.
Skip if
- You need transfer read speeds faster than 130MB/s.
- You require direct USB-C connectivity for newer phones or tablets.
Verdict: SanDisk Ultra Fit 128GB USB 3.1 Flash Drive 5-Pack delivers low-profile storage for multiple devices with 130MB/s read performance. It gives you five dependable plug-and-stay drives backed by a five-year warranty.
THKAILAR 256GB Dual USB-A & USB-C Flash Drive
Best for: swapping files between Type-A and Type-C devices
- USB Version
- USB 3.1 (what this guide is about)
- Storage Capacity
- 256GB
- Connector Type
- USB Type-A, USB Type-C
- Read Speed
- Up to 120MB/s
- Compatible Device
- PC
- Dimensions
- 2.8 × 0.7 × 0.4 inches
View on Amazon: THKAILAR 256GB Dual USB-A & USB-C Flash Drive
This Thkailar flash drive offers 256GB of storage and features a USB 3.1 interface with dual USB Type-A and USB Type-C connectors. Its metal swivel housing protects the ports without a loose cap. It delivers read speeds up to 120MB/s across Windows, macOS, Linux, and Android devices. This drive suits you if you need to transfer files between newer Type-C hardware and standard Type-A computers without carrying separate adapters.
Pros
- Dual USB Type-A and USB Type-C connectors
- 256GB storage capacity
- Read speeds reaching up to 120MB/s
- Integrated metal swivel cover
Cons
- Write speeds are not specified
- 120MB/s maximum read speed is slower than higher-tier USB 3.1 drives
- Smartphone use requires manual OTG support and activation
Good fit if
- You need both USB Type-A and USB Type-C connectors on a single drive.
- You want 256GB of storage for moving files across PCs, Macs, and Android devices.
- You prefer a metal swivel body that eliminates separate protective caps.
Skip if
- You require read speeds exceeding 120MB/s for large data transfers.
- You use a phone that lacks USB OTG functionality.
Verdict: Thkailar 256GB Dual Type-A and Type-C Flash Drive provides flexible dual-port connectivity and 120MB/s read speeds for multi-device workflows. It is a solid 256GB option if you regularly move data across both legacy and modern USB ports.
Specifications side by side
| Spec | Amazon Basics 256GB USB 3.1 Retractable Flash Drive | Apricorn Aegis Secure Key 3NX Encrypted Drive | SanDisk 32GB Ultra Dual Drive USB-C | PNY Elite-X Fit 128GB Low-Profile USB Drive | Samsung BAR Plus 128GB USB 3.1 Flash Drive | Samsung Bar Plus 128GB USB 3.1 Flash Drive | Samsung BAR Plus 64GB USB 3.1 Flash Drive | SanDisk Ultra Luxe 32GB USB 3.1 | SanDisk 128GB Ultra Luxe USB 3.1 Flash Drive | SanDisk Ultra Dual Drive Luxe 256GB USB-C | SanDisk Ultra Dual Drive Luxe 32GB 5-Pack | SanDisk Ultra Dual Drive Luxe 64GB 5-Pack | SanDisk Ultra Dual Drive Go 128GB USB Flash Drive | SanDisk Ultra Fit 128GB USB 3.1 (5-Pack) | THKAILAR 256GB Dual USB-A & USB-C Flash Drive |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Storage Capacity | 256 GB | not specified | 32GB | 128GB | 128GB | 128GB | 64 GB | 32GB | 128GB | 256GB | 32GB | 64GB | 128GB | 128GB | 256GB |
| USB Version | USB 3.1 | USB 3.1 | USB 3.1 | USB 3.1 Gen 1 | USB 3.1 | USB 3.1 | USB 3.1 | USB 3.1 Gen 1 | USB 3.1 Gen 1 | USB 3.1 | USB 3.1 Gen 1 | USB 3.1 Gen 1 | USB 3.1 | USB 3.1 | USB 3.1 |
| Connector Type | not specified | not specified | USB-C, traditional USB | not specified | not specified | not specified | Type-A | USB-A | not specified | USB-A, USB-C | USB Type-A, USB-C | USB Type-A, USB-C | USB Type A & Type-C | not specified | USB Type-A, USB Type-C |
| Read Speed | Up to 130MB/s | not specified | Up to 150MB/s | Up to 200MB/s | 400MB/s | not specified | 200MB/s | 150MB/s | Up to 150MB/s | 150 MB/s | up to 150 MB/s | up to 150 MB/s | up to 150 MB/s | Up to 130MB/s | Up to 120MB/s |
| Security Standard | not specified | 256-Bit AES XTS, FIPS 140-2 Level 3 | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified |
| Pack Quantity | not specified | 1 | not specified | not specified | not specified | not specified | not specified | 1 | not specified | 1 | 5 | 5 | 1 | 5 | not specified |
| Compatible Device | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | PC, Tablets | PC, Tablets | PC, Tablets | PC, Tablets | not specified | PC |
| Size | 256 GB | not specified | 32GB | 128GB | 128 GB | not specified | 64GB | 32GB | 128GB | 256GB | 32GB | 64GB | 128GB | 128GB (5-Pack) | 256GB |
| Security Features | not specified | 256-Bit AES Encryption, FIPS 140-2 Level 3 | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified |
| Features | not specified | not specified | OTG Dual Drive | not specified | Metal Casing | not specified | not specified | not specified | not specified | OTG Dual Drive | OTG Dual Drive | OTG Dual Drive | OTG Dual Drive | not specified | not specified |
| Dimensions | 2.24 × 0.79 × 0.53 inches | not specified | 0.37 × 1.5 × 0.79 inches | 0.83 × 0.6 × 0.25 inches | 1.58 × 0.61 × 0.47 inches | 1.57 × 0.61 × 0.46 inches | 1.57 × 0.61 × 0.46 inches | 1.57 × 0.62 × 0.23 inches | 0.23 × 1.57 × 0.62 inches | not specified | not specified | not specified | not specified | 1.17 × 0.56 × 0.2 inches | 2.8 × 0.7 × 0.4 inches |
| Weight | 0.32 ounces | not specified | 0.32 ounces | 0.49 ounces | not specified | 0.35 ounces | 0.35 ounces | not specified | not specified | not specified | not specified | not specified | 1 pounds | not specified | not specified |
| Color | Black | Black | Black, Silver | Silver | Gray | white | BAR Plus (Champagne Silver) | Black | Black | not specified | black | Silver | Black | Black | Black |
| Model | LS21USB256G1 | ASK3-NX-8GB | SDDDC2-032G-G46 | P-FDI128EXFIT-GE | MUF-128BE4/AM | MUF-128BE4/APC | MUF-64BE3/APC | SDCZ74-032G-G46 | SDCZ74-128G-G46 | 256GB_FD_Ultra Dual Drive Luxe_Lan | 32GB_FD_Ultra Dual Drive Luxe x5_Lan x2 | 64GB_FD_Ultra Dual Drive Luxe x5_Lan x2 | SDDDC3-128G-G46 | SDCZ430-128G-B5CT | T2 |
If you need network storage instead of portable drives, review the best NAS hard drives with USB 3 0.
Choosing the Right USB 3.1 Drive
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Calculate Storage Capacity Requirements
Assess how much data you intend to store before picking a capacity. Low capacities like 16GB or 32GB handle basic text documents and small transfer tasks. If you archive system images, media libraries, or install files, select 128GB or 256GB options instead. For example, the THKAILAR 256GB Dual USB-A & USB-C Flash Drive provides adequate volume for large backups while avoiding the space constraints of smaller units. Match the gigabyte rating directly to your largest anticipated file collection.
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Evaluate Physical Form Factor
Check physical dimensions to ensure the flash drive fits your operating environment. Low-profile designs measure under an inch long and barely protrude from a host port. They work well for permanent expansion in laptops, sound systems, or car stereos where protruding sticks can snag or snap off. The PNY Elite-X Fit 128GB Low-Profile USB Drive measures 0.83 inches long and 0.6 inches wide, staying flush against hardware. If you frequently plug and unplug your drive, standard-length sticks offer better grip.
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Verify Real Write Speeds
Manufacturer headlines often emphasize read speed while omitting write performance. Read ratings indicate how rapidly you open files, but write speed controls how long you wait when copying files to the drive. Many standard USB 3.1 drives maintain modest write speeds regardless of their fast read ceilings. The Samsung BAR Plus 64GB USB 3.1 Flash Drive reaches 200MB/s read speeds, but caps write throughput at 30MB/s. If your daily workflow involves moving large individual files onto flash storage, verify published write figures beforehand.
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Select Connector Protection Styles
Examine how the USB connector is shielded when traveling. Capped models shield ports from debris, but small caps are easy to misplace during routine transit. Retractable mechanisms slide the connector inside the outer casing, removing loose parts while protecting the interface. The Amazon Basics 256GB USB 3.1 Retractable Flash Drive uses this sliding build to guard contacts without a separate cap. If you frequently toss storage into bags or pockets, look for capless sliding or pivoting designs over loose-cap alternatives to maintain physical connector integrity.
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Consider Multi-Drive Bundles
Decide if you need one high-capacity drive or several independent units. Multi-packs help you isolate different workloads, such as separating personal files, bootable operating systems, and client deliverables. Multiple drives also prevent data loss across distinct projects. The RAOYI 64GB Retractable USB 3.1 Flash Drive 3-Pack offers mixed casing colors, allowing you to visually catalog separate file types across multiple machines. If your computing setup requires sharing data across multiple workstations simultaneously, multi-drive packs provide more functional deployment flexibility than a single large flash drive.
Frequently asked questions
Which USB 3.1 drive offers the fastest read speeds?
The Samsung BAR Plus 128GB Metal USB 3.1 Flash Drive leads with 400MB/s read performance. This speed is ideal for transferring large media files or system backups quickly. It sits inside a durable all-metal housing that provides physical protection for your data during daily use.
What is the best USB 3.1 drive for hardware encryption?
The Apricorn Aegis Secure Key 3NX Encrypted Drive provides hardware-level 256-bit AES encryption. It also features FIPS 140-2 Level 3 validation for certified data security. This makes it the top choice for users who need to protect sensitive information on portable drives.
Which drive is best for swapping files between phones and computers?
The SanDisk Ultra Dual Drive USB-C is designed for cross-device transfers between USB-A and USB-C hardware. It offers read speeds up to 150MB/s and features an OTG dual drive design. This makes it a practical, pocket-sized bridge for basic daily storage tasks.
Which USB 3.1 drive has the most compact low-profile design?
The PNY Elite-X Fit 128GB Flash Drive offers a micro-sized footprint with a 0.25-inch height. Its low-profile build allows you to leave it connected to laptops, vehicle sound systems, and consoles without obstruction. It delivers read speeds up to 200MB/s for unobtrusive storage.
Which drive includes a retractable capless design?
The Amazon Basics 256GB USB 3.1 Retractable Flash Drive features a sliding design that eliminates the need for a separate cap. It delivers solid 130MB/s read transfers for dependable daily file storage. This practical everyday choice is ideal if you do not mind the 30MB/s write limit.
Which USB 3.1 drive is best for bulk multi-device transfers?
The SanDisk Ultra Dual Drive Luxe 32GB 5-Pack delivers dual-connector versatility across multiple drives. It features 150 MB/s USB 3.1 Gen 1 speed and paired USB-A and USB-C plugs. This makes it a practical multi-device solution for bulk file sharing across several separate drives.