Looking for feedback concerning disk usage of this server

When Beehaw was first launched our disk usage (physical space on the server) was approximately 45%.

Right now we are up to 72% and this will continue to climb over time.

At the moment, I can only see two options. Firstly, go up an additional tier with our server host which would increase the monthly hosting cost.

Secondly, figure out a way to remove old and inactive posts. Hopefully, there is a batch process for this or something similar. I'm not an expert in this area, sadly.

What are your thoughts?