Hi, I've recently switched to a 2011 iMac with internal 256GB SSD and 1TB HDD. My old Mac (2006) just had a 500GB HD. My iTunes library (350GB) is on an external drive. Everything was backed up with Time Machine to another external drive. However, Time Machine drives me crazy by backing up every hour. It used to take so long and slow my Mac down. This may change with this newer Mac though. Is it wise to backup from external drive to another external drive? Will this slow things down? Is there some kind of throughput issue when doing this? I'm now attempting to devise a better backup strategy and now that I have a 1TB internal drive, would it be better to move the iTunes library to that? I have moved my pictures and movies folders to it. I've thought about using Time Machine to backup the SSD and SuperDuper to backup iTunes but I'm not sure SuperDuper is ideal. The smart update option is dangerous if I was to unknowingly delete the iTunes folder itself, or a large chunk of folders as the next backup would mirror that. So, I'm looking for some advice from you backup gurus. I have 2 1TB external drives. My SSD has about 160GB of data, my pictures and movies have 140GB and my iTunes lib is 350GB. Thanks.