Fire Emblem Engage Switch Xci Nsp Update 1.3.... «Original»
Use a standard installer to side-load the 1.3.0 NSP. This will "patch" your base game without deleting your save data.
Remember that to use the 1.3.0 content (Chrom/Veronica), you must also have the DLC/Expansion Pass NSP installed. Why You Shouldn't Skip Version 1.3.0 Fire Emblem Engage Switch XCI NSP Update 1.3....
This is the format used for digital eShop games, DLC, and Updates . Use a standard installer to side-load the 1