This might have been discussed before but a search couldn't find it. I have a Lacie 160GB ext. HD formatted in the NTFS file system. Acronis True Image 9.0 creates one file when I backup my C drive to the Lacie. I've just added a Buffalo 300GB ext. HD to my system and it came preformatted and it auto installed (as it was designed to) on connection. An Acronis image saved to this new drive resulted in 18 files all of 4,194,304KB. Then I noticed that the drive was preformatted in the FAT32 format. I would prefer the latter disc to be in the more powerful and secure NTFS format and I am aware that I can run convert g: /fs:ntfs at the command prompt to achieve this. My question is, although I understand that no data will be lost during the conversion, will the converted files still be accessible to Acronis should either the image need to be reinstalled or when it comes to do my first incremental backup?? Or, will I have to do the conversion to NTFS followed by creating a new image?? Any help would be most welcome.