Terraria Community Forums

Cloud save is when your data gets saved to an account (like the one your device is set up with). SAving data to the cloud enables you to retrieve data on any device that uses that cloud account. Local save saves progress just the Terraria application.

Local save means the save data is on your physical machine. Cloud save means the save is located on an online storage center that can be accessed by you when you need it.

Terraria, or rather Steam's, Cloud saves are remote backups of the same saves on your machine. Steams Cloud saves maintain a physical presence on your machine in a sub-directory of your steam data folder. Which is why they are technically Cloud Backups and not actual Cloud Saves.

So what y'all are saying is if I create a Terraria on the cloud save option that I'll be able to play that game data from multiple devices

From the platforms you own, Xbox 360 and Mobile, the information is as follows: Mobile Cloud saves will allow you to access the save between devices of the same platform, not cross platform. See the link for additional details: https://support.505games.com/en/support/solutions/articles/6000039858-how-do-cloud-saves-work-in-the-mobile-version-of-terraria-