Freeing up space on your Switch microSD card lets you download new games and content. Start by deleting games you no longer play: go to 'System Settings' > 'Data Management' > 'Manage Software', select the game, and choose 'Delete Software'—this removes the game file but keeps save data. Archive games you might play later: select 'Archive Software' to store save data while freeing up space, and redownload the game for free anytime. Delete old screenshots and videos: open the 'Album' app, select multiple files, and tap 'Delete'—you can back them up to a PC first using a microSD card reader. Uninstall unused DLC: go to 'Manage Software' > 'Downloadable Content' and delete add-ons for games you’ve removed. If you need more space, upgrade to a larger microSD card (up to 2TB) and transfer data using the Switch’s 'Move Data Between System/microSD Card' tool.