Reddit mentions of Honey-Can-Do STO-01006 Stackable Bed Risers, 4-Pack, White

I want to second plastic storage boxes!! I packed almost everything in plastic bins (like 223 feet big ones). I stored them under my bed, which was on bed risers so that they'd fit underneath. In a small space, it helps a ton to have everything well organized. It's even better if they're not 100% full, because she'll end up with new stuff in her time there.
I suggest bins for: 1. bathroom stuff, makeup, medications; 2. school supplies and electronics; 3. cooking supplies and snacks; 4. cold season clothes; 5. warm season clothes; 6. bedding, towels, etc.
That should cover most things, but I'd say keep it at 9 bins or less. Any furniture type stuff not included.
Overall though, she'll need less than she thinks she does. Dorm rooms tend to be tiny. Less stuff increases your quality of life in them by a lot. She can always grab more stuff when she comes home for Thanksgiving or Christmas.

For example, I would say bring two towels maximum. (I brought one and was totally fine. Laundry is easy to do.) I didn't need really any cooking supplies. I used my meal plan for almost everything. A powerstrip with a long cord (6 feet+) was really useful though. Outlets were in weird places and we weren't allowed extension cords.

Edit: I had a shelf that went over my bed that was super handy. Depends on how the room is laid out, but it gave me a ton of extra space without taking up much. Like this one. That and a lamp were the only furniture I brought with me.