>>105808197I'm not familiar with the full size ATX version of the case, I assume it has better mounting options desu. I use the mATX version for a windows XP build and just used laptop drives mounted to the rear of the motherboard tray- I believe this is the same mounting system as their other mATX cases. Looks like the ATX version can mount one 3.5'' hard drive below the 5.25'' optical drive, with the XL version offering one (or two?) more drive mounts in the "cable management" routing thing. Overall I really liked building in the case, and I don't usually go for more than two drives anyway, I've got other options for bulk data storage.