Owner of a new MBP here. First time mac user. I'm not too sure of how and what Time Machine backs up, so I'm asking this question. Normally on all my windows machines, I've always partitioned the main hard drive into an OS partition (where the OS and all installed programs reside) and a Data partition (where I keep all my music, documents, pictures, videos etc in case the OS partition dies/crashes/corrupts) so that my valuable data isn't lost. Do I need to do this with my OS X HD or does Time Machine back up all documents and files as well as OS settings? If Time Machine does indeed duplicate all the other data then of course a partition is not necessary, but if it doesn't then I guess I will need to partition to increase redundancy (as well as having a lot of my data backed up on an external as well). In the latter case, can someone recommend a good HD partition program that is free?