The original Nintendo Switch includes 32 GB of internal storage.
Nintendo designed the standard Switch to use game cards for physical games while providing internal flash storage for downloaded games, updates, downloadable content, and save data. Because some of that capacity is reserved for system software, the usable space is lower than the advertised 32 GB.
The console supports expansion through microSD, microSDHC, and microSDXC cards, making removable storage important for players who buy games digitally. The 32 GB figure applies to the original launch model and the later Switch Lite, while the Nintendo Switch OLED model increased internal storage to 64 GB. These storage figures describe built-in capacity, not the size of a game card or the maximum supported memory card.
Save data is generally stored in the console’s system memory rather than on game cards or microSD cards. Nintendo Switch Online cloud backup can provide an additional way to protect compatible saves.