The sneaky culprit eating my Android storage shocked me

I've been using my Samsung Galaxy Z Flip 6 for over a year, and for the past few weeks, I've been getting low storage notifications. So, I did the obvious thing and deleted a bunch of old photos and videos, cleared out downloads, and uninstalled apps I hadn't opened in months, which is usually the biggest storage hog on a phone. The free space would go up for a day or two, and then the warnings would come back.