Can't update iPad since iTunes uses drive C. Solutions?

Question

Can't update iPad since iTunes uses drive C. Solutions?
Yeah, I've seen this topic:
http://apple.stackexchange.com/questions/27446/i-do-not-have-enough-free-space-o n-the-c-drive-of-my-windows-computer-to-run-t
But which one is 100% working solution?
Thanks.

Answer 1

Relocate iOS device backups
Assuming you're running Windows Vista or later you can use the following steps:
Open a command prompt by hitting the start button and typing CMD<Enter> in the search box that opens up.
To move the current backup folder from C: to D: type in this command (on one line) and press <Enter>
Move "C:\Users\<User>\AppData\Roaming\Apple Computer\MobileSync\Backup" "D:\Backup"
Where <User> is your Windows user name.
To make iTunes look for the data in the new location type in this command (on one line) and press <Enter>
MkLink /J "C:\Users\<User>\AppData\Roaming\Apple Computer\MobileSync\Backup" "D:\Backup"
If your target drive has a different letter or you already have a folder called "Backup" then edit "D:\Backup" accordingly in both commands.
In some cases (perhaps depending on what builds of iTunes were installed in the past) it seems the folder is in the \Local\ branch of AppData rather than \Roaming\ in which case edit to suit.
If you're still running Windows XP you can use Junction (cmd line tool) or NTFSLink (shell ext). In both cases you move the existing folder to a new location, create an empty folder where the old one used to be, then use the tools to get the operating system to link the two together and silently redirect any file operation on the old location through to the new one.
Note that while this method works for iOS device backups it cannot be used to redirect sections of the media library.
If your iTunes library is on the C:\ drive with the media folder held elsewhere then see also make a split library portable.
tt2