* Android/Linux system modes require 128GB+ cards (+RM30 each). Full jailbreak includes your first 3 games.
Method 1: Official Switch Settings
1. Go to Home Menu → System Settings (gear icon).
2. Scroll down to Data Management.
3. Look under microSD Card on the right for Free Space (e.g. 145 GB).
Method 2: Via DBI App (Modded Console)
1. Launch DBI app on your Switch.
2. Check the bottom-left text: Free: XX.X GB and enter that number above.