I have an external usb harddisk with one partition and of course several files on it. I used it to transfer files from one pc to another. Till now I never had problems with it.
Today I experienced the problem, that the disk will be recognized on the new pc, but when trying to access it OS (Windows XP) asserts the disk is not formatted and offers to format it.
I moved the disk back to the first pc, but there now I'm having the same problem.
It seems that OS recognizes the disk and assigns a drive letter, but is no longer able to read partition table.
I don't want to reformat the disk, because I don't want to loose about 100 GB of data.
How can I make, that Window XP is able to read the disk properly again?