: Depending on your platform (in this case, presumably a Nintendo Switch), you may need specific software or a homebrew environment to install NSP files.
If you want update 1.5.2 or later, here is the : wylde flowers nspupdate 15217638rar link
NSP files are used by the Nintendo Switch to distribute and install games and updates. When a game like "Wylde Flowers" receives an update, it often brings new features, bug fixes, and improvements to enhance the gaming experience. The mention of a .rar link suggests that the update might be distributed in a compressed format, possibly for easier sharing or downloading. : Depending on your platform (in this case,