I was reminded today, again, that it is a good idea to have copies of any important digital documents in at least two locations. Those little USB flash drives occasionally stop working or get misplaced, so I wouldn’t recommend keeping your only copy of a file on there.
Likely your school-provided network storage location is backed up automatically, so that’s the best place to store things. I’ve also written previously about online (Internet) storage options for your files.
That reminds me, I need to backup my photos at home.