In Move, there is no concept of traditional global storage. Instead, you can store global data using a shared object, which lets you encapsulate data that can be accessed across different modules or functions. This approach helps manage data similarly to global variables in other programming environments .

The shared.move file in the Tic Tac Toe example provided by Sui showcases how a Game object is shared so both players can interact with it. The use of shared objects in this context allows global-like data sharing across different participants .

An example of using a shared object to store global data in a Move smart contract is demonstrated on the Sui documentation: transfer::share_object(Object { id: object::new(ctx), ... }). This method involves creating an object that has the key ability, allowing it to be part of Sui's global object pool .