I have used MAXTOR OneTouch II for years to back up directories on my desktop. All this time my desktop had MS Windows XP. Now the university has repalced it with MS Windows 7. In windows 7, the MAXTOR shows up as F:/, and says that 69 GB is free out of 279 GB. But it says no files found. How can I get back my data that I have backed up on MAXTOR OneTOuch II?