: Manually updating a game file to a specific version or merging DLC (Downloadable Content) into the base game file.
This is the modern, safest method. Used by Atmosphere CFW (Custom Firmware), LayeredFS does not alter the original ROM file. Instead, it tricks the Switch into reading modified files from a separate folder on the SD card ( /atmosphere/contents/ ). nintendo switch rom patcher
If you are using an emulator on Steam Deck or PC, learning DeltaPatcher is essential. If you have a hard-modded Switch OLED, LayeredFS is superior. : Manually updating a game file to a