Sandisk Extreme USB 3.0 Extremely Slow.!


I just purchased Sandisk Extreme USB 3.0 pendrive and i get read speed of just 39 mbps.

I tried formatting in various filesystem like NTFS, FAT32, exFAT etc, but same 39 mbps.

My configuration

core i7 ( 3rd generation ) , 8GB RAM, 5400 RPM hDD.

Even write speeds are around 40 mbps.

Are your USB ports 3.0? If you plug a 3.0 flash drive into a 2.0 port, you won’t see any speed advantage.

Definetely, that’s the issue. But knowing that it’s i7, it should be a USB 3.0 already. Can you verify this? Also, try this on another computer just to isolate the issue. <img src=“”/>

well, yes i am on USB 3.0 port.

Here are the crystal disk benchmark :-

Read Speed : 30 mb/s and write speed : 28 mb/s

I certainly do not expect such slow speeds because even my USB 2.0 pendrive performs faster than that .! :frowning:

I am curious whats the name of the USB 2.0 pen drive that  performs better ?

it is transcend.

However it is just because my USB 3.0 Sandisk pendrive is slow, nothing else.

Are you using the SecureAccess app?