Hello Everyone!! This is my first post, so please be gentle!! I finally made the switch from Windows to Mac earlier this week and purchased an iMac. Being the careful individual I am, backing up is something I regard as essential. I have my iMac connected to an External Hard Drive via USB which stores all my music/videos/photos etc. I went to turn on Time Machine on my iMac and got the message that my hard drive needs erased and re-formatted. Obviously doing this will undo my hard work over the past few evenings copying music/photos/videos etc from my Windows machine to the iMac. From what I can gather by trawling the net my options for backup are as follows; 1. Move music/photos/videos back to the iMac temporarily, re-format and set up time machine with the external HD (HD) and then copy all music/photos/videos back onto HD. Question: if my HD goes pop and breaks, I presume I will have lost everything, since Time Machine is also backing up to the HD? 2. Purchase a 2nd External Hard Drive and plug into a free USB port on the iMac and set this up with Time Machine. Question: will I notice a fall in the speed/performance of my iMac with 2 HD's connected? 3. Purchase a Time Capsule and set this to backup wireless using Time Machine. Question: will thsi still backup my music/photos/videos even if they are stored on my HD and not on the iMac Hard Drive. 4. I believe HD can be plugged into the USB port on the Time Capsule, however I'm unsure of exactly how this works. For info I only have 1 Mac, connected directly to a printer and LAN connection to my wireless router, which is on another floor of the house. Therfore home networking is not really a requirement. I have a windows netbook and an iPhone which I use to surf the net via the wireless router if I'm not near the iMac I would greatly appreciate any thoughts you guys may have on the best way forward or any alternatives you can suggest. Thanks in Advance!!! Howie!