I have a laptop that is showing a C: and D: drive. However the D: drive has lost its file system type. This makes reading the drive impossible. There is data on the drive, but I can't access it. Everytime I try to select it it says "this drive is not formatted, do you want to format it" When I say no, it says drive is not accessible. Can I assign this drive a file system type without formatting it and losing all the data?