Media isn’t federated. The media should just be referenced with a link to the original source.
Normally, the largest use of disk space is the Activity table. It is stored for six months, and only useful for debugging. Below is the Issue, along with SQL commands to check and purge this debugging table. Let us know if this was the issue
Lemmy still has some issues that need to be addressed for it to fully replace Reddit for my needs
Be honest, do you still use reddit?
There is no easy way to do this. Each Lemmy instance uses their own autoincrement ID for posts. So post 12345 here might be post 54321 on another instance.
It has been suggested that each post gets a universal ID (UUID is an example). Then the local server could just examine the URL and redirect the user to the local post. This suggestion hasn’t gotten any traction. The dev team is more focused on fixing the huge performance issues right now.
Oh my, you are correct. Images are being federated some of the time.
Like most everything else, the intended behavior isn’t documented anywhere.