One way. Double click on My Computer. Riht click on the drive in question. Choose properties. It will show you whether the drive is Fat32 or NTSF. If it is FAT32 you will need to convert it…
Now use the Windows XP convert tool: Go to Start | All Programs | Accessories | Command Prompt (or, from a Run box, type CMD) and, assuming you intend to convert C:, give the command:
VOL C:
Note the name of the disk in the first line, and the Volume Serial Number (for example, 3F4E-2D1B) in the second. Then type:
CONVERT C: /FS:NTFS
It will ask for that name in confirmation. Then it will ask two further questions. Reply Y each time to set up conversion to happen at the next boot, then restart the machine. (If you are converting a partition other than the operating system’s partition, you may find that it runs without rebooting.) After returning to Win XP, the hard disk will work for two or three minutes, tidying up. Leave things alone during this time.