With no recent changes, I am getting an alert that I am out of storage space (22GB). Previously I was at less than half. I checked the size of all the folders and files (on the web client) and the largest folder is 2GB and a few with around 800MB, but it's not possible they add up to 22GB. What's going on? It feels like it's a push to upgrade, but I don't need to, I just need to be able to use the space I have! Any ideas?