> I store my belongings with a storage company. They rent facilities from a property owner. The storage company goes under while my stuff is still in the storage unit. I go to the property owner and say my stuff was in there. They say, no, that's owned by the storage company. Incorrect - the belongings were owned by me the entire time, the storage company was just holding it for me. I need to prove it was mine, but I don't lose property rights just because it's in someone else's possession.

You are a subtenant. The tenant went bust. The case law on this is settled. Depending on state, you either have a period of time to vacate the premises or you can/do become a tenant of the property owner. People have been subleasing rooms/apartments for hundreds of years, so every possible scenario you could imagine in this space has been litigated to death.

That is real estate.

American case law about data stored on computers is that whosoever owns that computer owns all the data on that computer. Which is why US privacy law is far weaker than EU privacy law (where you own the data about yourself). I think pets.com was one of the very few exceptions where the TOS said "we won't sell your data" and the bankruptcy liquidator said "it is an asset, we sure will sell it" and the courts said "no you can't sell it".