I started a transfer of a file to my USB stick - it started at around 50-100MB/s and then dropped down to ~15MB/s for the most part.
Why would this be and what can I do about it?
asked Apr 28, 2019 at 18:33
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1 Answer
The USB drive probably has a high-speed cache (50+ MB/s writing). When this small cache is full, the drive writes to slower flash memory.
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Do you mean it could be an issue with the USB stick itself? (and not the PC?) - I could test that with some other sticks I guess : ) Commented Apr 28, 2019 at 19:00
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Yes, it's very likely that it's just a slow USB stick. Commented Apr 28, 2019 at 19:02
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1I think this is rather the memory cache of Windows - reading into memory is fast, but when it fills up writing is slow.– harrymcCommented Apr 28, 2019 at 19:43
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1Only getting a faster stick. One that supports USB 3, or even USB 3.1 if you have the right port.– harrymcCommented Apr 29, 2019 at 8:12