SanDisk Ultra USB3 drive is painfully slow.

Malevolence · 19 Mar 2021 at 05:25

And by painfully slow I mean the transfer speeds when writing to it drop below the 1MB/s mar and quite regularly bottom out at 0kb/s. It doesn't matter what size file I try to transfer, large, small or multiple of each the same thing happens, It starts out at 40MB/s and then after a few moments drops to USB1 speeds and below. This happens when plugged into the front USB ports (blue), or any of the USB ports on the rear panel (both blue and red).

Example, am currently transferring a 16GB file across and it's already been going for 30 minutes and is reporting another 30 minutes until complete. An hour to transfer a 16GB file via USB3 is just wrong.

Windows 10 and all drivers are up to date, including USB drivers, and this only happens on this drive. And it's not the ports because if I plug my portable HDD in I get it's full speed transfer.

Malevolence · 19 Mar 2021 at 06:16

Yeah, Googling is dire thanks to all the fake sites and crappy advice on the horrendous MS threads (how can MS have such a horribly formatted board system?) Have tried all the usual stuff, no active AV scanning, turned on/off write caching for the drive in Windows etc. It's a new drive too, but will source a testing tool and see what that says, but upon Googling a bit deeper it looks SanDisk drives are just ****. Seems loads of people having the same slow transfer speeds. Will probably just end up buying a different brand, Corsair ones are supposed to be OK for living up to the advertised speed, or so I've heard.

Malevolence · 19 Mar 2021 at 06:41

Yes manufacturers make a multitude of different models, but if I'm buying something that's advertised as being USB3 and claiming speeds to match then surely I should be expecting USB3 speeds and not those of USB1 and USB2.

Malevolence · 19 Mar 2021 at 07:32

Yeah, had to cancel the benchmark halfway through as it was taking ages - got to the 4MB and it hadn't progressed after 10 minutes. Something ain't right here, on the box it said 80MB/s write and 150MB/s read.

Malevolence · 20 Mar 2021 at 18:06

Cyber-Mav said:
Fake usb stick?

Could be, but I don't think it's a fake one, came from OcUK, was in official packaging and is metal rather than plastic like the fake ones. Think it's just a dud.