You can use a properly formatted external hard drive or USB drive. You can also re-partition your hard drive to allow use of a non-NTFS partition. There is a live cd version of gparted at: http://gparted.sourceforge.net/index.php Use caution and back up EVERTHING you wish to save, BEFORE doing anything with your drive. It has been reported to work on NTFS partitions. As to whether it is safe or not, you are on your own.