I've got a Green WD 2TB that is formatted to NTFS. After about 1 day of use (approx), for no reason whatsoever, it changes to RAW, yet all the files are unusable. Windows recognises it as NTFS still in Windows Explorer, but CHKDSK says it can't check it because its RAW.

After a reboot all is fine again for another day.

I've checked the disk after a clean reboot and checked the drive with HDD Sentinel that explains its "PERFECT".

Clearly a file system problem and I'm considering reformatting it to FAT32 to see if the problem persists.

Anyone every come across anything like this and did you solve it?
Only happens with one of my drives. The others are fine.

Any suggestions?