: This is the Title ID . While the base game’s ID is 0100C2500FC20000 , IDs ending in different sequences often refer to specific updates or DLC, like the Side Order expansion.
: A compressed folder format used to make the large game file (Splatoon 3 is roughly 9.9 GB) easier to share and download. The Story Behind the File Splatoon 3 [0100C2500FC20800][v589824][US].nsp.rar
Every part of that long name tells a story about what’s inside: : This is the Title ID
: A file format commonly used for digital Nintendo Switch software, similar to an .exe on a PC. The Story Behind the File Every part of
: This represents the Version Number . In the Nintendo Switch operating system, version numbers are calculated by multiplying the update number (like v9.0.1) by 65,536. [US] : Indicates the region is North America.