i have three partitions in my Windows 7 hard drive, i do use it as an external drive cos i have my fills there, all of a sudden i stopped seeing two of the partitions where my files are am and am only seeing the SYSTEM partition but am not seeing the main partition. If i go to COMPUTER MANAGEMENT to view it i will be seeing the full 500gig hard drive listed on the left but on the other side i will only be seeing the SYSTEM partition which is just 1gig.please help me out on how to bring those my partitions back please...