They started cracking down on various way people got unlimited storage for free. Aome team drive changes i think.
Also pretty much killed the one user unlimited paid accounts. I had alot there and prices were going to be 500 mo. So i bought a bunch of hard drives and another synology. All local now.
Look at vacumn command. Also dbeaver is a teally good gui tool. Right now there is one table thats the main cause (i think its called activity but dont quote me on that there was a post about it)
That table is mainly for debugging as it logs every action in activitypub your instance does. I truncate it once a week and vacumn it (shrinks the disk space used). Caution. You must shut down lemmy before doing so. I run containers so i stop all except postgres and clean it up.
I aquire 50/50. I do buy from thier store and use calibre and calibreweb for the other “store” calibre web has pretty good support but you do have to do a very easy config update to sync over wifi. But i basically add to a shelf in calibre web and that syncs to the reader. it just works