I recently changed where I was storing my games to free up some space on my C drive but galaxy didn't recogenize half of my games. Not sure if it's a bug or something I did wrong, can anyone help me out it would be much appreciated.

Update you need to go in and import them induvidually even if you move the entire galaxy folder. This aspect could use some reworking.
update the game makes you innduvidually import most games. Sort of annoying could use a fix.