Files on usb not working right?

I recently found an old usb drive I had lost about half a year ago. Suddenly the files don't work right. Movies stop and freeze after a few minuites and I can't skip or move the timeline without causing it to stop. I probably won't be using this usb drive but I'm wondering what could have caused... show more I recently found an old usb drive I had lost about half a year ago.

Suddenly the files don't work right. Movies stop and freeze after a few minuites and I can't skip or move the timeline without causing it to stop.

I probably won't be using this usb drive but I'm wondering what could have caused this, the contacts are good and there are no errors when I use windows or hdtune to check the drive.

I've formatted it and it seems sluggish to transfer.

It's a scandisk 3.0 usb thumb drive, 32mb.
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