USB Drive Corrupted Files

[david747001]

I periodically backup files onto two usb drives (from a Dell M70 laptop) and always check the integrity of both sets of files when done. The files sizes on one of the drives have now changed (after a week) by a few kb each and the files cannot be opened (except, interestingly, mp3 files). There are a mixture of files from small word documents to 100s mb avi files. All the files can be seen by windows explorer (and for example copied elsewhere) so it seems like part of the file (header info?) has been stripped away. This is the second time it's happened within weeks of each other and the usb drives are different (and still usable - after deletion of the files, the drives can continue to be used apparently normally). Any ideas to fix or isolate problem would be most welcome.
Thanks.

 

[G0AOZ]

Have you checked the USB drives for viruses? How about running CHKDSK /R on these drives. You could also try completely reformatting them...

ROGER - G0AOZ.