I noticed recently on my Matrix Synapse homeserver that my storage was starting to get a little bit full. I hadn't considered it in the past since the server sees very little use, but I decided the best way to solve the issue would be to move my media storage onto an S3-compatible service.

Unfortunately, I overestimated the number of useful resources that would exist to help me configure that, and underestimated how difficult it would be. Here's a quick rundown of what I learned after a full day of hair pulling and how to set things up for your own server.