I have a Western Digital 250 GB external HD. I connected it to my PC, and NO PROBLEM, then I wanted it also connected to my iMAC. I bought a USB 2port switch, and connected it to the iMAC. It asked me to initialize the disc so I saved everything I had on the disc to my PC and then initialized and of course it erased the disc. Now the iMAC sees the drive just fine but upon clicking the switch the PC cannot see it anymore. Is this possible to do and what do I need to do to make it work for both the iMAC and the PC? I'm running OS9, and XP. ANY and ALL suggestions welcome and wanted.... thanks folks.