Hi Sharif,
I am running Windows 8.1 on a Samsung Series 9 ultrabook. I am having the same "reconnect your drive" problem in File History. I think here is where my problem began (bear with me if the information below isn't relevant):
In July I found that windows was backing up to SkyDrive too much (and too often) so I googled the problem, and found the solution (uninstalling and reinstalling SkyDrive). The problem seemed to be solved, but then Windows Notification kept asking me to
"reconnect my drive".
File History was associated with SkyDrive, but now there is a message: "File History Doesn't Recognize This Drive". Under the file path, it reads (in italics):
unknown error.
Under my user account, I have two SkyDrive folders, one of them has the extension (.old).
I don't know what Windows is actually asking me to do. Can you clarify what's going on here?