Users with custom firmware (CFW) like Atmosphere can dump their legally purchased games into NSP files for backup purposes. These backups allow you to play without swapping cartridges or to keep a library on an external hard drive.
: Always prefer purchasing games and content from official sources like the Nintendo eShop. Not only does this support the developers, but it also ensures you're getting legitimate content without potential malware. keep talking and nobody explodes switch nsp fre repack