SanDisk Ultra USB3 drive is painfully slow.

Malevolence

Malevolence

Malevolence

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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.

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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.
 
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I have read about this issue, I cannot remember the real cause and fix (not most of the fake BS you can find or poor advice on MS threads), not sure if it was AV scanning the files related.

I have a Sandisk 64GB Extreme and its still just above advertised speeds.

It could just be on way out, try see if you can get a tool from Sandisk to test it for errors or get 3rd party one or even try the Windows built in one.
 
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 said:
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.
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The problem surely is that many manufacturers make far too many models.
So SanDisk and Kingston etc., make drives which are fast and drives where the words USB 3.0 are merely marketing (as USB 2.0 was previously).
Also lots of drives might have okay reads but terrible writes.
You really have research any drive you but first and hope the manufacturer hasn't done a bait and switch in the meantime.
Corsair's bulky drives might just be more consistent in that they're not trying to hit a price point for the local supermarket.
 
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.
 
SanDisk are a good brand even under WD, I have no issue with their USB drives or SD cards.


Official claimed speeds R=250MB/s & W=190MB/s

My results:

R= 268MB/s

W = 198MB/s


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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.

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if its from ocuk then its safe. ebay ones are to watch out for. tried to wipe it and test again? i know usb sticks slow to a crawl with loads of small files but big video file should get full speed from it easy.
 
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