Been working on this for along time and to no avail. When I try to format a standard 4.7gb disk (which is rounded to 4.38gb before format, tried several times and different brands), error message recieved if 'windows was unable to complete format'. The file type comes up as RAW (also says 0 used, 0 free), which I assume is the default before formatting. Tried many many solutions including: 'testdisk' which was unable to detect anything & some disk partition stuff; none of which worked in the slightest. I wiped my entire hardisk clean including OS and reinstalled every piece of software 1 by 1 for nothing. tried formatting before installing anything or doing any customisation, apart from the essentials. I can only assume that it is the disk drive, I did this thing once where you disable then enable the driver in the past and that worked, but it must be something different this time. Finally the drive can still read commercial disks fine, its just trying to format and burn files that is the problem.