I've been using my HDD for booting games for a long time now, it's the only way because my disc drive died a bit after my warranty expired. Anyway, before I used to use the wbfs format for my backups and I was satisfied for the most part, that is until IT happened. Because my HDD is partitiones I insert it into all sort of OSs, none of which recognized the wbfs but they didn't erase it either. After some time I realized my backups became damaged, maybe because of all the thrash OSs add to partition (I'm looking at you OSX =( ) and became unplayable. Now that CFG usbloader can load from a NTFS partition I restored most of my backups and placed them on my NTFS partition. tl;dr Using isos in NTFS takes way too much space as opposed to wbfs's compression, how can I reduce the size of my dis images to save some space on my hdd?