If I follow these steps to convert my hard drive to NTFS, Will it format my hard drive, and I will lose everything on it? Thanks! FAT/FAT32 versus NTFS Q. I installed Windows XP, but did not know whether to use FAT, FAT32 or NTFS. I chose FAT32. Was this correct? A. FAT, FAT32 and NTFS are hard drive formats. FAT32 is an evolutionary development of the File Allocation Table, a system that goes back to DOS. The New Technology File System (NTFS) was developed for Windows NT. Microsoft recommends that you use NTFS, which it says is more fault tolerant and has better security. If you are already using FAT or FAT32, you can convert to NTFS. Click Start>>All Programs>>Accessories>> Command Prompt. At the command prompt, type: convert C: /fs:ntfs That assumes your hard drive is C:. If it is not, substitute the correct letter. During the conversion process, you will be asked for a volume name. Press Enter. This conversion process also applies to Windows 2000.