Datastorage or how to save efficiently?

I Would like to know how to save things, as of now I only know how to save leaderstats, and thats on a single place, How do i save things like Variables or even parts in one Game UNIVERSE Not just a single place, thank you all in advance!

To use in a game universe, you can use DataStore, but if you want to save variables through places which isn't in same Universe, you can use HTTP to save to other sites like Trello. Either way, you CANNOT save a part. You can save part's variables but you CAN'T save a part. Here's a LINK which can help you for DataStore and here's another LINK which can help you for HTTP scripts

Don't forget you only can access to DataStores by using Server Script. Also, HTTPService scripts cannot access to Roblox.com

Edit: If you need help about those, you can PM me or send a comment under my answer.