We have been sharing files in our office for the last year between Mac OSX 10.5 and XP Pro All of a sudden one of our WD External Drives died and so did most of our Client backup Files. We work in a graphic design office. I then installed a Seagate Terabyte drive in my XP machine to share and back up files from the other production iMacs. First few days we were able to back up files I can see the files still on my XP machine, I can read them and launch the proper apps for them etc... However when I try and send more files from the mac machines or read files from the Terabyte Shared Drive all I am able to see is the shared drive from Finder. I click on it and I get the Error message " The operation cannot be completed because the original item for "DRIVE NAME" cannot be found" and sometimes get the error "unable to mount drive" or something like that.