KeyValue = The first letter of DataStore's type name : "unique key".
The examples below shows how we can get the value of "myUniqueKey" from GlobalData Store
Ex1: myUniqueKeyValue = G:"myUniqueKey";
OR - you can use Full type's name:
Ex2: myUniqueKeyValue = GlobalDataStore:"myUniqueKey";
The result from both examples will be the same.
You have to use first two letters for "PersistedOrder" and "GlobalSettings":
PersistedOrder
Ex3: myUniqueKeyValue = PO:"myUniqueKey";
Ex4: myUniqueKeyValue = PersistedOrder:"myUniqueKey";
GlobalSettings
Ex5: myUniqueKeyValue = GS:"myUniqueKey";
Ex6: myUniqueKeyValue = GlobalSettings:"myUniqueKey";