I recently deleted all the files on an external disk drive, then tried to re-format to get rid of a backup file which would not delete.
The stubborn file now seems to have gone, but windows reports that it cannot format the disk.
It now seems to be in RAW format instead of NTFS, which it was before, and I cannot access or format it.
I have tried disabling then restarting, but no success.
When I look in the disk's properties it says Used space = 0 bytes and Free space = 0 bytes.
It is a 2Tb hard disk, and I am running Windows 7 Home Premium.
Any idea how I can recover this disk and make it useable again?
open a command prompt window by going to 'start\run' and typing 'cmd'
To convert a disk to NTFS, type 'convert (drive letter): /fs:ntfs'
So for example, if you were going to convert your C: drive, you would type 'Convert c: /fs:ntfs' at the prompt.
Does the drive (raw) show a letter in disk managment? If not then select to try and to assign one. If that fails then right click and select delete.
You should get the 'safely remove' pop-up in the notification area. Phsically remove the usb drive and wait a few seconds. Reconnect and Windows should install 'drivers' for it, although it strictly speaking won't be drivers but a new MBR.