Flash Drive

I really have not a clue what to get Ken for his birthday. I know he likes tools but since we got a house he has bought more tools and I never know what tools he already has and what tools he still needs to get. I know that he keeps this flash drive on his key chain that hold a lot of information on things that he needs. He always seems to forget things when we are out so he keeps all his notes about things like the car stuff right on this small flash drive. I know that if I could actually get a hold of it there just might be something that he wants for his birthday on it. However I do not really know how I could do it without him having a clue as to what I am doing.
He also has it full of his school information as well so I would need it long enough to sift through some files. I loved buying him tools when I knew what he had and what he needed. He loves getting new tools as gifts but now that he has so many and he was given so many from his dad I seemed to have lost track. I don't know much about them so I guess I will still keep thinking. I only have a few days left. I hope I think of something.