My flash drive suddenly stopped working.

I was transferring files from a Geek Squad 16GB flash drive when I got a error saying a file couldn't be read, then another error saying the drive had been improperly ejected, and the drive disappeared and then remounted. I moved a few more files, and I got the same error saying a file couldn't be read, then the same one saying the drive was improperly ejected, and the drive vanished.
Now the drive no longer shows up in Disk Utility, but it does show up on a System Report. It does not show up on my other computers—either my Mac Mini or a Windows 7 laptop.
However, if I leave the drive in the port, my Air will periodically try to re-mount it. The light on the drive will flash, and an error comes up that the drive is unreadable, and I am given the option to Initiate, Ignore, or Eject. If I go into Disk Utility before I make a selection, the drive is visible, but not selectable.
I have tried all three options with no success. I have restarted, rebooted, and rest the PRAM.
Nothing works.
I need the files off of the drive, so what should be my next step?

I would try all USB ports and if no change, on another Mac.  If no success, the USB drive is corrupted.
Ciao.

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