There are many different collectibles to find and collect within Lego Star Wars: The Skywalker Saga, one of which is the Datacards.
There is a total of 19 Datacards to find altogether. To find which ones you have currently collected you can find a list over in the Extras menu.
This specific page is dedicated to showing the location to the Studs x2 Datacard
This specific Datacard can be found in the Jundland Wastes area over in Tatooine.
At Jundland Wastes and more specifically Old Ben Kenobi’s House there will be a wall that you can climb up, go ahead and do so.
From there keep climbing up the wall. Once at the top destroy the box to find a tool you can use to cross the wall.
Now swing and jump across the gap and to the opposite side. Once at the other side, continue on across the next gap too, using the same method.
Keep climbing up the wall and once at the top stick to the left to find the Datacard.