Moin Moin, I am thinking about getting a single USB HD to replace my 3 small external ones and have a little more capacity. I am currently still using a Windows PC but will get a Macbook as soon as Apple updates them. I want to use the HD with TimeMaschine once I got the Mac. Until then I need it to backup a whole lot of files (prolly nothing larger than 4 gigs for now). So my questions are: 1. Can I just buy any USB HD and it will work with Time Maschine? 2. Option A: Can I format it in NTFS in order to connect it to my PC (and to friends PCs as well) and then install something on my Mac later on so that the Mac can read from NTFS? If so, what would I have to install and does it work with Time Maschine? I want to use the disk as well to copy most of my data from my PC to my Mac once I have it. 3. Option B: Is FAT32 a lot slower than NTFS or the Mac system? As I said, right now I don't really need to copy files larger than 4 gigs, but you never know what will come up, so I think I rather don't want to do this. I think that's it for the moment. Thanks a lot. Basti.