Hi there, I have just bought a new iMac and I also have a Western Digital Passport white light network drive that I used for the PC's. I connected the WD drive to the iMac by the ethernet cable and switched on Time machine. Every thing was fine but recently the iMac is reporting it cannot connect to the WD and that the network is unavailable. I can see the WD in finder and is listed as WD World Passport and WD Passport Backup, however when I click on the backup one it reports "Connection Failed". I have tried connect as but the button is greyed out. The WD World Passport works fine. I have tried to delete Time capsule settings in Library but that has not worked either and every time i try and set it up again it still presents me with the WD backup list of choices. I don't need to restore the iMac but although the iMac can see the partition I can't delete it to start again with Time Machine. I read one post and it told me that the WD was not suitable but it seemed to work ok for the first few months and now seems corrupt. I think I need to delete the back up partition but I don't know how to do that. I have also tried to reset and format the WD through the PC link but the iMac still sees the other backup partition. Can you be gentle with me as although I'm fine with PC's I am still trying to get to grips with the mac stuff. Thanks in anticipation.