I've had my MBP for about a month and a half now, and it's my first laptop so the idea of an external hard drive for backup is new to me. However, the more and more I read through forums and stuff the more I find I'd probably be more comfortable with an external hard drive. So, I have some questions. Reading some other threads on external hard drives I saw that the G Tech G Drives are very highly praised. I saw they are kinda pricey, however when reading reviews on cheaper ones it seems there's always a few people with issues about them flat out breaking. I'd rather invest in something that is going to be great quality instead of risk losing the backup, so I was thinking of going for a G Drive. Is this a good choice, and are there any other super reliable brands that are less expensive? I have a 120GB hard drive. I've read I should get at least the same capacity for a backup drive, even if my entire hard drive isn't full (or even close). This is obviously logical because I may have a more full hard drive in the future, but even if I don't plan to ever have that much data, is this an absolute requirement? I've read that firewire is a lot better/faster for connecting. I've seen FW400 and FW800, I assume 800 is better, can someone provide some info on each? Also in comparison to USB 2.0? Is it better to have the drive plug in to power or be "bus powered"? Are there any good free backup programs? Do most external hard drives come with a backup program, and if so, are they any good? I'd probably want something that keeps an eye on what changes are happening and only backs up new files or changed files, to avoid unnecessary transfers. What's a good backup program that does this? I could handle a good one that costs money if it's not that expensive. Last question, may be irrelevant depending on the answer to the size thing. I have an old PC that is 5 years old and I will probably never turn on again. I read about people buying hard drives and cases and putting them together themselves for the best deal. Is it possible for me to take my hard drive out of my old computer, reformat it, get a case for it, and use it for backup? If this is possible, is the 5 year old thing an issue? It's only 80GB so if I have to have at least 120GB then this option is off the table anyway. Just curious. Thanks for the response and sorry if some of my questions are stupid, as I said I'm a noob to this whole external hard drive backup thing.