<human>: Could you distill the essence of the text into 1-3 sentences?

So yesterday, i was leaving class with my friend when some random classmate, i guess, came up to us and asked us if we had the class textbook. Obviously we aren't assholes so we told him yes and to meet us at the library. Once we got there, he pulled out an external hard drive and hooked it to my laptop. I copied the book on it with no problem. What i started finding weird was that he didn't have his laptop with him nor did he want to copy the hw from us. He had no problem taking an F like a champ even when he had 4 hours left to turn it in.  Once he left, my friend mentioned something about people being able to hack your laptop through external storage drives. Out of curiosity, I tried to look him up on our class roster but i couldn't pull him up from his name that he gave us. Now, i have pictures of important documents on it which now i have deleted because of this situation. I did a scan check on my laptop and i have no spyware and I have never saved passwords on my computer. My question is: If I took my computer to IT, could they check if any JPG or any sort of files have been copied?
<bot>: Might have gotten my computer hacked by someone's external hdd. Can IT see and locate which files, if any, have been copied?