hey, I'm about to partition my WD passport into two section . It's 120 gigs and I'm going to use 100 gigs to back up all by media on my mac (pictures music video) and then I'd like to have a 20 gig section for extra flexible storage/transporting files from computer to computer, including PCs. So carbon copy cloner says the drive has to be formatted to HFS+ but in disc utility I don't see HFS+ under partition/format. also for the smaller partition what would be the best format for what I described above?