Hi,I have a problem with my hdd. It hasn't fallen or anything but just all of a sudden it doesn't show up in My Computer. Before, it was showing up but was not accessible but this time when i try to change letter, it tells me that the disk management is not up-to-date. I have a Samsung M3 1TB portable hdd. I have tried the Hdd in other PCs but I'm getting the same problem.