This might be a stupid question, but I thought I would just ask. I plan on wiping my hard drive clean and then upgrading to snow leopard. Once I have all my backups restored in snow leopard would it be a stupid thing to do if I reformatted my external hard drive that I use for time machine and start new time machine back ups on my external hard drive? I would only do this of course once I have my settings, and files restored to my liking of course. Once I have them set up to my liking would would be the point of keeping my old backups, right? I could just start new backups once I have what I need restored. Would this be a stupid thing to do?