Hello,
The AnKing Step Deck doesn’t have subdecks by default, so you’ll need to unsuspend the cards you want to study using their tags. You can follow this tutorial: How to Get Started Studying
Then, you can create your own subdecks and move cards into them. To do this, select a tag, click on a card, press Ctrl+A (or Cmd+A on Mac) to select all, and then right-click to choose the “Change Deck” option.
You can learn about the meaning of all the tags here: 🏷️ What do all the tags mean in the AnKing Step Deck?
Let me know if you have any other questions. 