I am using Windows 7 Ultimate. I checked before I bought the drive that it was compatible with Windows 7.
Just tried to save something to drive A & drive B, but they came up with the same message 'Drive (letter) is not accessible. The request could not be performed because of an I/O device error'.
The drivers I have for both floppy drives are up to date and in the properties boxes of each in device manager there are no conflicting devices.
I read a few posts on google about how to fix this error message, but they all referred to out of date drivers and didn't say what else would cause/solve the problem.
I think I have stumbled across the solution by accident by uninstalling avg 11 av. I kept getting a message that 'there are no working components'. Had that up on the screen for 3-4 days and in the end I uninstalled it and reinstalled avg 9 av.
As it happens I tried the floppy disk drive again and it worked without any problems. Whether avg 11 was causing the problem is anybody's guess, but uninstalling it certainly seems to have helped.
Thanks again for the help, much appreciated.
hedley