Storage usage keeps going up

I have a self-hosted instance running in production for over a year now. The deployment has seen multiple updates and migrations of Appwrite versions. What I have noticed is that size on disk only goes in one direction, up. I have attached a snaphot of the server storage use. The major storage use is users uploading files which get removed after a relatively short period by a cron function. but even with deletions its doesnt seem to affect the storage use on server. Cant be expected behaviour. Any guidance on how I have supposed to salvage freed up storage ?

you could try using a tool like ncdu on your server to see what's filling up your drive - could be appwrite, could be something else