If I were to create my own instance federated with all the other instances, as of today, how much data would I be storing, since I would make a copy of all the content?

I know this will vary a lot, but I’m looking for a ballpark figure to have an idea. I don’t think it would be a lot, but I can’t find an estimate anywhere.

Reposted from https://lemmy.world/post/55030 as I think this community is probably a better fit