400MB/s vs 100MB/s USB Flash Drives: Which Should You Buy?
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You are comparing a 400mbs vs 100mbs USB flash drive to find the right storage for your needs. Both options offer 128GB of space and use modern USB standards for faster transfers than older drives. The main difference lies in their read speeds. One drive delivers up to 400MB/s, while the other tops out at 100MB/s. This gap affects how quickly you move large files like 4K videos. Your choice depends on whether you prioritize speed or specific physical features.
Key differences
| Aspect | Samsung BAR Plus 128GB USB 3.1 Flash Drive | SanDisk 128GB Ultra USB-A Flash Drive |
|---|---|---|
| Read Speed | 400MB/s | 100MB/s |
| USB Version | USB 3.1 | USB 3.0 |
| Build Material | Metal Casing | not listed |
| Dimensions | 1.58 x 0.61 x 0.47 inches | 0.42 x 0.87 x 0.31 inches |
Which one should you choose?
Choose Samsung BAR Plus 128GB USB 3.1 Flash Drive if
- You need to transfer large 4K video files quickly and want the fastest read speeds available.
- You prefer a rugged metal body that is waterproof, shock-proof, and temperature-proof for durability.
- You want a drive with a longer integrated design that includes a keyring for easy attachment.
Choose SanDisk 128GB Ultra USB-A Flash Drive if
- You want a compact, low-profile drive that sits flush with the USB port to avoid snagging.
- You are looking for a drive that includes a one-year subscription to file recovery software.
- You need a standard USB-A connector that is backward compatible with USB 2.0 ports.
Verdict: Choose the Samsung BAR Plus if you need maximum transfer speeds and a durable, all-metal design for harsh environments. Pick the SanDisk Ultra if you prefer a slim, low-profile form factor that stays out of the way and includes useful software. Both drives provide ample 128GB storage for everyday use.
Speed, Build, and Size Comparison
Read speed
The Samsung BAR Plus delivers read speeds up to 400MB/s, while the SanDisk Ultra offers up to 100MB/s. This fourfold difference matters when you move large files like 4K videos or high-resolution photo libraries. Transferring a 3GB file takes roughly ten seconds on the Samsung drive. The same transfer on the SanDisk drive takes about forty seconds. If you often move big media files between devices, the faster read speed on the Samsung model saves significant time. For small documents or occasional backups, the difference is less noticeable. You choose speed based on how much data you move at once. The Samsung drive is the clear winner here for raw performance.
USB version
The Samsung BAR Plus uses the USB 3.1 standard, whereas the SanDisk Ultra relies on USB 3.0. Both standards support backward compatibility with older USB 2.0 ports. However, USB 3.1 generally provides better bandwidth efficiency and potential for higher sustained transfers. The Samsung drive leverages this newer standard to achieve its 400MB/s peak. The SanDisk drive, limited to USB 3.0, caps its performance lower. If your computer has USB 3.1 ports, the Samsung drive will communicate more efficiently. Using either drive on a USB 2.0 port will slow both down significantly. The newer standard gives the Samsung drive a technical advantage in modern systems.
Build durability
The Samsung BAR Plus features a rugged metal casing designed to withstand daily wear. It is waterproof, shock-proof, temperature-proof, magnet-proof, and X-ray-proof. This metal body provides strong physical protection for your data. The SanDisk Ultra has a plastic body with no listed durability ratings in the provided data. It lacks the explicit waterproof or shock-proof claims found on the Samsung model. If you carry your drive in a bag with keys or other hard objects, the metal construction of the Samsung drive offers better peace of mind. The SanDisk drive is functional but lacks the same level of advertised physical resilience.
Form factor
The Samsung BAR Plus measures 1.58 inches in length, 0.61 inches in width, and 0.47 inches in height. It has a slim, rectangular profile with an integrated keyring hole. The SanDisk Ultra measures 0.42 inches in length, 0.87 inches in width, and 0.31 inches in height. The SanDisk drive is much shorter and wider, resembling a traditional key fob shape. The Samsung drive is longer and narrower. Your choice depends on how you attach it to a keychain or carry it. The SanDisk shape fits easily into small pockets without protruding. The Samsung shape is more elongated. Both fit standard USB ports, but the physical footprint differs significantly.
Included software
The SanDisk Ultra includes a one-year subscription to RescuePRO Deluxe file recovery software. This tool can help you recover accidentally deleted files. The Samsung BAR Plus data does not mention any included software or recovery tools. If you value built-in data protection and recovery options, the SanDisk drive provides this extra utility at no additional cost. The Samsung drive relies on standard backups and its durable hardware for protection. For users who frequently risk losing data, the included software on the SanDisk model is a practical advantage. For those who already use cloud backups, this feature may be less relevant.
Which Drive Fits Your Workflow
Users needing rugged, fast data access
The Samsung BAR Plus offers 400MB/s read speeds for rapid file transfers. Its metal casing provides shock and waterproof protection, ensuring durability for daily use. This combination of speed and physical resilience makes it ideal for professionals who handle large media files and need reliable hardware.
Budget-conscious buyers wanting standard storage
The SanDisk Ultra delivers 100MB/s read speeds, which is sufficient for everyday documents and photos. It includes Rescue PRO Deluxe software for data recovery. This drive suits users who prioritize basic functionality and included software support over maximum transfer speeds and rugged construction.
Those moving large 4K video files
Transferring large 4K videos benefits significantly from the Samsung BAR Plus's 400MB/s speed. The fourfold increase over 100MB/s drives reduces wait times considerably. Its compact metal design also ensures the drive withstands the rigors of travel, making it a practical choice for content creators on the go.
Quick picks
| # | Product | Best for | Price |
|---|---|---|---|
| 1 | Samsung BAR Plus 128GB USB 3.1 Flash Drive | Fast transfers and rugged durability | Check price of Samsung BAR Plus 128GB USB 3.1 Flash Drive on Amazon |
| 2 | SanDisk 128GB Ultra USB-A Flash Drive | Everyday file storage and recovery | Check price of SanDisk 128GB Ultra USB-A Flash Drive on Amazon |
The products compared
Samsung BAR Plus 128GB USB 3.1 Flash Drive
Best for: Fast transfers and rugged durability
- Read Speed
- 400MB/s (what this guide is about)
- Storage Capacity
- 128GB
- USB Version
- USB 3.1
- Features
- Metal Casing
- Dimensions
- 1.58 × 0.61 × 0.47 inches
View on Amazon: Samsung BAR Plus 128GB USB 3.1 Flash Drive Affiliate link
The Samsung BAR Plus 128GB USB 3.1 drive delivers read speeds up to 400MB/s. Its rugged metal casing is waterproof, shock-proof, and temperature-proof. This durable design protects your data during transport. The integrated keyring prevents loss. It suits users who need fast file transfers and a reliable, long-lasting drive for daily use.
Pros
- Read speeds up to 400MB/s
- Rugged metal casing for durability
- Waterproof and shock-proof construction
- Integrated keyring to prevent loss
- 5-year limited warranty
Cons
- Larger physical dimensions than standard drives
- Fixed USB-A connector limits portability
- No included carrying case
Good fit if
- You need fast transfer speeds for large files
- You require a durable drive for travel
- You want a reliable drive with a warranty
Skip if
- You prefer a compact, pocket-sized drive
- You need USB-C connectivity
- You are on a tight budget
Verdict: The Samsung BAR Plus 128GB USB 3.1 is a robust choice for users who prioritize speed and durability. Its metal build and high read speeds make it ideal for professionals who move large files frequently.
SanDisk 128GB Ultra USB-A Flash Drive
Best for: Everyday file storage and recovery
- Read Speed
- 100MB/s (what this guide is about)
- Storage Capacity
- 128GB
- USB Version
- USB 3.0
- Connector Type
- USB-A
- Compatible Device
- PC, Laptop
- Dimensions
- 0.42 × 0.87 × 0.31 inches
View on Amazon: SanDisk 128GB Ultra USB-A Flash Drive Affiliate link
The SanDisk Ultra 128GB USB-A flash drive offers up to 100MB/s read speeds. It connects via USB 3.0, which is backward compatible with USB 2.0 ports. The drive includes a one-year subscription to Rescue PRO Deluxe file recovery software. It measures 0.87 inches wide and weighs 0.48 ounces. This drive suits users who need reliable storage for everyday files without needing the highest transfer rates.
Pros
- Up to 100MB/s read speeds
- USB 3.0 connectivity
- 128GB storage capacity
- Includes Rescue PRO Deluxe software
Cons
- Read speed is slower than 400MB/s options
- No rugged metal casing
- Standard plastic build
Good fit if
- You need 128GB of portable storage
- You transfer files that do not require extreme speed
- You want included file recovery software
Skip if
- You require transfer speeds near 400MB/s
- You need a rugged metal design
- You frequently move very large files
Verdict: SanDisk Ultra 128GB USB-A provides steady 100MB/s performance for standard file transfers. It is a practical choice for users who prioritize included recovery software and standard USB 3.0 compatibility over maximum speed.
Specifications side by side
| Spec | Samsung BAR Plus 128GB USB 3.1 Flash Drive | SanDisk 128GB Ultra USB-A Flash Drive |
|---|---|---|
| Storage Capacity | 128GB | 128GB |
| USB Version | USB 3.1 | USB 3.0 |
| Connector Type | not stated | USB-A |
| Read Speed | 400MB/s | Up to 100MB/s |
| Compatible Device | not stated | PC, Laptop |
| Size | 128 GB | 128GB |
| Features | Metal Casing | not stated |
| Dimensions | 1.58 × 0.61 × 0.47 inches | 0.42 × 0.87 × 0.31 inches |
| Weight | not stated | 0.48 ounces |
| Color | Gray | Red |
| Model | MUF-128BE4/AM | SDCZ48-128G-U46 |
Frequently asked questions
Is 400MB/s read speed overkill for everyday use?
It depends on your file sizes. If you move large videos or photo libraries, the Samsung BAR Plus 128GB saves time. Its 400MB/s speed transfers data quickly. For documents and small files, the SanDisk Ultra 128GB is sufficient. Its 100MB/s speed handles standard transfers without issue.
Does the metal casing affect performance?
The Samsung BAR Plus features a metal casing that aids durability. It offers shock and waterproof protection. This build does not directly increase read speeds. However, it protects the drive during travel. The SanDisk Ultra uses a plastic design, which is lighter but less rugged.
Can I use a 400MB/s drive in older computers?
Yes, compatibility is generally backward. The Samsung BAR Plus uses USB 3.1, which works with USB 3.0 and 2.0 ports. You will not get full 400MB/s speeds on older ports. The SanDisk Ultra uses USB 3.0, ensuring broad compatibility with most modern and older systems.
Which drive is better for carrying sensitive data?
The Samsung BAR Plus is better for physical protection. Its metal casing provides shock and waterproof resistance. This durability helps prevent damage during transport. The SanDisk Ultra is smaller and lighter, making it easy to carry, but it lacks the same rugged protective shell as the Samsung model.
How much space do these drives hold?
Both drives offer 128GB of storage. This capacity is identical for the Samsung BAR Plus and the SanDisk Ultra. You can store thousands of documents, hundreds of photos, or several hours of video on either drive. The choice depends on speed and build, not capacity.
Is the SanDisk Ultra fast enough for 4K video?
It depends on the file size. The SanDisk Ultra offers 100MB/s read speeds. Transferring large 4K files will take longer compared to the Samsung BAR Plus. If you need rapid access to large video files, the Samsung drive is faster. For occasional viewing, the SanDisk speed is adequate.