International students often use it because it's not feasible to take their stuff home over the summer. I also used Summer storage, because I was estranged from my family, so didn't have a "home" to go back to and would have to spend the Summer in sublets or couch-surfing (the only accommodation that would accept me as a tenant were student properties, which is why I typically had to be out over the Summer).
My experience is actually in the UK, but based on anecdotes from friends, it's similar in the US.
In my case, in one of the years, I could apply to stay in university accommodation over the Summer, but the room I was allocated for that was tiny, so I needed to get some storage anyway. It's annoying as hell
Yeah its ostensibly to do stuff like pest control and maintenance (and my dorms really needed such things), but you'd think you could basically offer a "I'll keep my arrangements through next year" deal and get summer housing.
My university actually did have apartments and I think my friends were able to stay over the summer in those.
It depends on the school, but here in the US it is generally expected that the majority of students return home for the summer. Most universities have housing available over the summer but it is limited and generally reserved for those with disabilities and graduate students who are expected to attend the school for 4+ years. Most college students only go for a year or two.
I ain't dragging 2 carloads of pots, pans, desks, and clothes back home for 3 months when I know I'll be living in probably the same dorm again very soon. A waste of gas, time, and money.
When I was in college I just stayed in the same dorm and worked. If I had to remove shit I'd have done similar to OP, minus the cool case
It can cost more to bring stuff home and back tbh depending on your method of travel, you can’t leave your stuff at university, and a lot of people live in on-campus housing which shuts down all summer.
It can be way cheaper to find cheap storage facilities (or a local friend and pay them). It’s not just for lazy rich kids.