So I've been a Mac user for a while now and have formatted all my drives in to HFS. When I switched a little under two years ago, I discovered that my NTFS and FAT external drives were read-only when USB'd in to my OSX machine. Can OSX not write to these filesystems? Is there a workaround? Can FAT/NTFS Windows and EXT/UFS *nix read/write to HFS drives? (I've never really checked). I ask because I'm curious about it, I don't have a pressing ongoing issue of any sort.