The data card in Jundland Wastes is particularly hard to get.
Jundland Wastes Datacard location, Tatooine – Datacards – LEGO Star Wars: The Skywalker Saga
Data cards are the equivalent of red bricks in other LEGO games. They can unlock specific cheats and in-game extras like credit boosts and weapon variants.
There are a total of 19 data cards to be found on the many planets in the game.
The one in Jundland Wastes is especially hard to get because you have to climb a mountain. Fortunately, data cards appear on your map and are easy to find.