I have a few macs running Tiger and Leopard and do not have a hard drive that is filled to more than 20GB of the capacity. Looking for external hard drive solutions. I have found a couple of very good drives that only have FW 400 and USB 2.0, one in particular is a older model G-Drive 500GB for $50 that is supposed to be quite reliable. These drives are being blown out due to newer ones have esata and fw 800. Would I see a difference in speed cloning or backing up to a a fw 400 drive even if I get a newer mac that only has fw 800 ports and I use a 400-800 adaptor? The better drives are faster 7200 RM vs the slower 5400 drives, mostly portable that I have been looking at. I have been reading posts that for applications such as mine I would not see a difference. For the most part I use the computers for office related tasks including Word, Excel etc with not much else, although I have some different utility programs. I just want a bootable drive should my hard drive fail. I use Carbon Copy Cloner to clone my drives. My main comp has two drives where the primary is cloned to a secondary, but want a external that I can easily plug into a new mac and clone the hard drive in that Mac to my external drive!!! Any feedback would be appreciated. Thanks.