For those who may not be familiar, ROM NSP UPDATE DLC refers to a type of game update file for the Nintendo Switch console. ROM stands for Read-Only Memory, NSP stands for Nintendo Submission Package, and DLC stands for Downloadable Content. These files are used to update games on the Switch console, often adding new features, fixing bugs, and improving overall performance.

For those managing digital files (NSP/XCI), recent 2026 guides emphasize using updated homebrew installers like Missing Content: