As an aside, a quick question. You didn't happen to get your USB flash drive off eBay?
I ask because there have been many scams involving USB flash drives which claim to be greater capacity than they actually are. What the sellers do is flash the firmware so your pc sees the capacity as what they specify. For example they can tell a 2gb flash drive to appear as 8gb in yours, or any pc.
The reason I am telling you this is that once the real capacity on one of these has been reached, the USB flash drive will actually corrupt data trying to fit more on the drive than it's capacity can handle.
Hopefully you will be able to recover your data. Once you have done this or you have exhausted all your avenues of data recovery you can run an application to view the real capacity of the flash drive and verify whether or not it has been tampered with.
The first link is a write up about the flash drive scams:
Thanks for the quick response btk1w1. Out of desperation, I tried Recuva last night and though it took forever (5 hours) to scan my drive. I was able to save just a few files. (Not nearly enough of them.)
I'd try Zero Assumption but it seems as though that's only for images and my files are mostly documents, pdf's and powerpoint presentations.
To answer your other question, I got my drive at Microcenter, where thy supposedly have a lifetime warranty (on which I will now be capitalizing). Based on your info, I'll check it's true capacity as well. Thanks Again. . .I'll post my results shortly.
Of course, I used it a while back to recover precious photos from a friends corrupted HDD.
If you bought the flash drive from a reputable retailer it is probably legitimate. Don't use the program to verify the flash drive capacity until you have exhausted your options at file recovery as it writes to the drive (it will overwrite data) and will make the chances of file recovery less likely.