I seem to recall a post about this within the last week but when I search Time Machine and backups, the search function on macrumors tells me there is no match, so I apologize for a repeat post. What am I doing wrong? The Leopard upgrade install went fine this AM and I left the house only to return to find sequential hourly backups of my entire internal HDD on my 500GB external. I do want it to back up the entire internal HDD, but I thought one backup would override the prior (now that I think about it, that would kind of defeat the purpose of the "time machine", wouldn't it?). Can I configure Time Machine to do just one backup a day and/or overwrite the prior back up, so that my entire 500GB external HDD won't be overrun in less than a week? Alternatively, can I set it to automatically delete all but the newest backup, or does this have to be done manually (and can doing this manually be done safely -- seems kind of tedious to do it manually, however). Thanks.