This indicates the file is compressed into a "RAR archive." To use it, you would need to extract the actual .nsp file using software like WinRAR or 7-Zip . Game Context: "Produce Piece"
These cards (marked with a green leaf icon) trigger their effects immediately when played and again during the Spring and Autumn "Prepare for Season" actions. Everdell (NSP)(Update 1.1.4.495).rar
"NSP" stands for Nintendo Submission Package, the standard file format used for games and updates on the Nintendo Switch. This indicates the file is compressed into a "RAR archive
If you are using this file for a modded console or an emulator: Everdell (NSP)(Update 1.1.4.495).rar