Sorry, I couldn't change the title of my previous question, and I thought of a simpler way to state my situation.
I've read all previous posts in this forum and can't find anything regarding this situation.
Let's say a person has a 2TB external HDD filled with games, XBLA, covers, trailers, etc. That HDD is failing, so he gets a new one and clones the data. Now he plugs the HDD in and every game is "greyed out" and the path shows "Disconnected" for GAMES and CONTENT folders in "Manage Paths"