There are many advantages of converting FAT32 filesystem to NTFS filesystem. NTFS filesystem provides high performance with file level security. You get the option of providing security such as controlling the level of access that is granted to individual users. Windows has built-in tool to convert FAT32 to NTFS without loosing data. Go to "START" and click on "RUN" to open RUN window. Type "cmd" and press ENTER key to open DOS window. In the command prompt type "convert <drive> /fs:ntfs" without double quotes and press ENTER key. Type the partition you want to convert in the <drive> parameter. (Example: C:). Type "convert /?" at command prompt to see more parameters. If you are converting the partition in which the operating system is installed, you will get an message saying that it cannot convert now as the drive is in use and the conversion will be done only next time the computer is restarted. It will ask you for confirmation. Press "Y". This happens because the drive you are converting is utilized by windows operating system. That is windows paging file cannot be terminated immediately. It is not possible to convert NTFS to FAT32 in windows. NTFS to FAT32 Converter is a free tool to convert FAT32 to NTFS and NTFS to FAT32 without loosing data.