64G SanDisk Extreme USB 3.0 Flash Drive

I got 2 replacement drives sent from Sandisk themselves. One drive works perfectly fine, the other one displays the same symptoms as already discussed in detail.

With regards to the working drive, I can format it with fat32, exfat, it works just fine.

I believe there is nothing wrong with my Mac's USB 3 ports, to me it looks like Sandisk got issues with the 64GB drives.

G

My first one of these wouldn't work either - I sent it back to where I bought it for a replacement and the replacement works fine. I did notice that the inner packaging on the fucntional replacement was slightly different - the clear plastic was 'fused' together where the first one was not. Probably a sign that it is from a different (working?) batch.

Anyway these USB sticks are pretty amazing when they work (so fast!), so its worth sending it back til you get a functional one 🙂

Hi all,

I just received my first-ever USB3 flash disk.

It's not a SanDisk, it's a PQI "U821V" (USB 3.0/2.0 16GB).

I do have very similar issues though, with my MacBook Air:

- long time to show up in Finder

- impossible to use (too slow)

- wil automatically unplug itself after a minute or so, and complain (⚠) that it should not be unplugged so violently

- no way to format it Disk Utility (will never unmount)

BUT... plug it with a USB 2 (not 3) extension cable, and everything works fine... except it's not USB 3 and it's a pain to carry a cable with the stick!!

(not to mention it works perfectly on a Win7 PC - but with USB 2 only: can't tell with USB 3)

I also bought another one for a friend from PQI. I thought it was the same in another color, but the cas is different... and this one seems to work perfectly on the MBA.

So, there are problems with MBA USB 3 ports... even if they occur only with a list of devices, these devices are not only SanDisk.

Hello,

Is this problem resolved by anyone? Can anyone provide a solution to this because I'm still facing the same problem with my MAC Mini (2012+ model).

When I connect a newly purchased Sandisk Ultra USB 3.0 16GB my MAC freezes (mouse, keyboard does not work) and am unable to do anything except wait like a dumb. But then the good thing is the MAC responds back when I just disconnect (pull off since it doesn't allow to be Ejected ) the USB stick.

Any Solutions, tricks would be appreciated.

Maneesh

I have the Extreme USB disks and wow am I impressed with this. I get 245MB / Sec read speeds. I put Mavericks on mine and then encrypted it with FileVault 2. Even encrypted it boots my MacBook Pro in about 10 seconds.

I am curious if Sandisk said what the problem was? I had absolutely no issues with mine.