From technet.microsoft.com
To convert a volume to NTFS from the command prompt
- Open Command Prompt. Click Start, point to All Programs, point to Accessories, and then click Command Prompt.
- In the command prompt window, type: convert drive_letter: /fs:ntfs
For example, typing convert D: /fs:ntfs would format drive D: with the ntfs format. You can convert FAT or FAT32 volumes to NTFS with this command.
June 11th, 2009 at 10:37 am
how can you switch back…..do the opposite?
June 11th, 2009 at 1:20 pm
“The conversion to NTFS is a one-way process. After you convert a drive or a partition to NTFS, you cannot convert it back to FAT or to FAT32. To restore the volume to the previous file system, you must reformat it as FAT or as FAT32. This action erases all existing data including your programs and personal files. In this case, you must either restore your data from a backup.” -from MS Technet