Windows 10: USB 3 transfer speed falling after 10 seconds?

So I've had a lot of trouble with USB3 - I've never really had the consistent transfer speed it's supposed to provide.

I know that initially the RAM caches the transfer which is why it starts very high, then falls, but mine is falling to sub-20MBs.

As in, copying TO the flash drive - I never get the 70MB+ speeds USB3 is supposed to be capable of. Sometimes starts there but quickly drops. And yes, my flash drive is plugged into USB3 slots.

This is the case with both flash drives I've tested on this system - and yes, my drivers are USB3 too. And it happens whatever the size of the file.

What can cause a drastic drop in transfer speed?

EDIT: just to point out copying from the drive to the PC is perfect - 130MB+. It's copying TO the drive, that's the problem. Cheers.

:)

 

High speed UHS-II SD cards

Does anyone know if UHS-II is enabled via USB 3 in Windows 10 ?

MY UHS-II cards transfer data at 150MBs (and worked under Windows 7) however, under Windows 10, data transfer locks up at about 20%. Slower speed cards (e.g. 30MBs) work fine via USB 3 and USB 2 ~ and the high speed cards work via USB 2 (at lower transfer
speeds). Maybe UHS-II isn't enabled yet for Windows 10 ~ one wonders why !?

 

usb 3.0 issue

after udating to win 10,my wd hard disk does not get recognized on my usb 3 port while my sandisk pendrive get detected on it but with very low transfer speed of around 10 mbps.hdd get detected on usb 2 port by the way .hope u know the soluton.

 

That's about right. Most USB flash drives are limited by the speed of the flash memory in them, and most of them cannot write as fast as the interface will allow. Can you give the brand and model numbers of the drives?

 

On many drives the Read and Write Speeds are not the same , read can be quite high but write is usually another story especially with cheaper drives.

 

I believe the fact my drives are extremely inexpensive has contributed to this. Read speed is cheap, write on the other hand is not. The best one I have is a 64GB Sandisk SDCZ43-064G-G46 - literally about £10. Honestly thought I'd get high write speeds but evidently not! The benchmarks I've seen online suggest this type of flash drive writes around 15-30MB or so.

 

Yeah, 'cheaper' was my downfall here I think!

 

I recently bought this drive:

https://www.pny.com/turbo-3-0-usb-fl...P-FD64GTBOP-GE

Except I bought the 256GB version, and have been quite surprised by both the read and write speed. 300+MB/s. Quite good for such a cheap drive.

 

That's impressive. 300MB write speed?!

 

Actually it was more in the upper 200's, but still yeah, it was quite surprising.