This is the standard, uncompressed format. It is essentially a digital version of a game cartridge or eShop download.

: NSZ is best if you are archiving games or have limited space, as it is much smaller to download and store. switch nsp nsz super mario 3d world bowsers fury best

For most users, for storage, while NSP remains the standard for universal compatibility. This is the standard, uncompressed format

Set Accuracy Level to "High" for Bowser’s Fury to fix the rain effects. This is the standard

Based on your search query, you are likely looking for the best way to play on a Nintendo Switch emulator (such as Ryujinx or Yuzu), or you are trying to decide between the NSP and NSZ file formats.