How to make a Roblox save system on another game place

Hello there! How do I make a Roblox save system? This save system is where we transport to another place game and then finish an objective, the reward from the objective will be given on the first place (the game) I hope you can help me, the save system is basically like the tds save system.

Make a place inside of the game experience. Data stores will work in other places but not other experiences.