Art-path - start by opening one hint at a time to see if it's enough information
Did you remember to mark in the map where you found the five art pieces across campus? If not, do it now.
Connect the marks on the map, starting from the first (Egg) moving on to the pillar (Interstitiel) and then continue. Just like you used to do when you where a kid. Important things tend to emerge from such drawings.
When you have connected all the dots in the map and hold it with North facing upwards, your lines should have formed a 2.
The right number and first digit in the code for the USB-stick is therefore 2