What to put in filing cabinets now I’m going digital?

[piddocktrumperiness]

I’ve moved to a new school and I’m lucky that there’s quite a bit of storage. I have a filing cabinet and I’ve never had one before. It’s a secondary school and most of my resources are digital, so I’m looking for ideas- if you work in an office, or school setting, what do you or how do you use your filing cabinet?
mine has three drawers, the top being v small, then the middle is medium, bottom fits standard files.

Shoes, random crap that I haven't thrown out, food.

Fill one drawer with snacks/cereal bars. A lot of children are not fed much at home so will be nice to be able to help them in that way.