Samsung BAR Plus 128GB: Read Speed Versus Write Speed
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- The 128GB model is rated up to 60MB/s writes, well below its read figure.
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A Titan Gray USB-A flash drive, model MUF-128BE4/AM, with nominal 128GB capacity. Samsung advertises up to 400MB/s reads; its 2024 data sheet lists up to 60MB/s sequential writes for the 128GB version. Neither figure is a hands-on result from us.
Pros
- Nominal 128GB capacity in a small metal-bodied drive.
- Samsung rates reads up to 400MB/s.
- Backward compatibility covers USB 3.0 and USB 2.0 systems.
Cons
- The 128GB model is rated up to 60MB/s writes, well below its read figure.
- USB-A does not insert directly into a USB-C-only port.
- Actual read/write performance varies with host and test conditions.
Frequently asked questions
Is 400MB/s its write speed?
No. That is the advertised read maximum. Samsung’s 2024 data sheet lists up to 60MB/s sequential writes for 128GB.
Which color and part number are these notes for?
Titan Gray, model MUF-128BE4/AM, with nominal 128GB capacity.
Does it have a USB-C plug?
No. This version uses USB-A; a USB-C-only device needs an appropriate adapter or a different drive.
Will it work in an older USB port?
Samsung documents backward compatibility with USB 3.0 and USB 2.0 systems. The port and host can limit transfer speeds.
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