What do you want to achieve? I want to send messages to a (offline) player in-game and when the messaged player joins he/she can see the messages sent to them.
What solutions have you tried so far? I looked around the forum but couldn’t find anyone with my problem.
Does anyone have an idea on how to take on this problem? Should I use datastores?
Datastores are the way to go, yes. If I were you I’d store a table with all the sent messages in order and load and render it everytime any player assigned to that chat joins.