

Or they could just do what discord does and let you log into multiple accounts at the same time. As good as federation is for freedom, it is a privacy nightmare. Anyone who federates with you gets a copy of either everything, or all the metadata depending on what software and server we are talking about. Matrix shares all metadata, Lemmy shares almost everything by necessity.
It would depend on how critical the data is and if the cost benefit analysis breaks even or tips in favor of the moon. I would imagine housing state secrets up there would be reasonable, and documents (text files) don’t take up a huge amount of space. Video would be more challenging. But realistically you could probably store all of the Secret and Top Secret documents across a few servers with maybe 5 drives in a RAID config each. Probably even a single NAS-like solution.