What datastore does Loomian Legacy use? / What's a good way to save tons of data?

You can’t load models / server scripts from the client, neither create them. That WAS possible without filtering enabled, but now it is not. Something like command bar acess would require LoadStringEnabled for example. If you have a module, model which let’s you do that, that’s a bit shady.

Again without LoadStringEnabled, you can’t make the server do anything via client.

Also you can’t send functions to the server either, it would give the returned value inside that function.

Yes! You’re getting it!

This is shady, and it is a thing. That’s the whole deal.