more specifically, how should i back up my data, seeing that i have one 350 gb external hard drive and two boots i want to keep. it's a bit long so stay with me. about seven months ago, i purchased a new 320 gb internal hard drive, which i installed snow leopard on fresh. i then removed the 80 gb internal hard drive that came with the macbook which had tiger (never snow leopard). on my external, i have two partitions as of right now, one with the superduper! clone of tiger, and the other of random data i want to keep. the other day, i noticed that it's been a while since i last backed up my computer, and i would like to do it again, but i'm debating how to do it, and plus, i thought i was going to get a second external hard drive by this point, but that's not going to happen for a while at least. i have two options i'm debating (i'll take suggestions from others as well). all the solutions have my 10.4 backup still around and 10.6 being backed up. 1. bring back my first internal, copy the 10.4 backup to that internal and store it away, and use the external as a time machine only. pros: i don't need 10.4 around much, but it insures that it's there in case i need it (but 10.6 has worked well for me in seven months). issues: i would have to use a screwdriver every time i want to access 10.4, concerned if 10.4 would boot on it's own due to the nature of this backup. 2. put the extra data over to 10.6 and have the backup containing 10.6 and the extra data, with 10.4 remaining on the external hard drive. pros: can easily boot to 10.4 if need be. issues: less space to back up 10.6 as i'm lagging on 10.4. thanks again.