This is a small guide on how to partition your USB Storage Device as two or more partitions to use with the PC and USB Loader. You do not need a separate program to format. 1) Be sure to backup your files; I AM NOT responsible for any data loss. 2) Load the "Disc Utility" app from within Windows. For Windows 7 and Vista; Click Start, and type in "disc u", without the quotes. If you see "Disc Utility" show up, click on it. Sorry, don't use Windows XP. 3) Once the app is loaded and you see your disc, right click and select "shrink partition". Use this to figure out how many MB's are in the amount of GB's you want to have for the new partition. BE SURE YOU HAVE DONE STEP 1! 4) Once the partition is created, right click on the partition which is "Unallocated Space". Follow the onscreen instructions. 5) You now have a new partition! I recommend re-formatting it via the built in Windows option. (Right click on the drive and select format) If you have a GPT disc, then follow this guide to get rid of the GPT disc and convert it to a Master Boot Record (MBR) disc, then follow my partition guide. Hope this helps!