Files labeled as "NSP" are often used with CFW (Custom Firmware). Be cautious, as downloading these from unofficial sources carries risks of malware or console bans.
If you install only the base game + 13.0.2, you will see Sora and Kazuya greyed out on the character select screen. You need the matching [01006A800016E800][DLC].nsp files to use them. Super Smash Bros. Ultimate -NSP--Update 13.0.2-...
Are you planning to pick up the to complete your set? Files labeled as "NSP" are often used with
Highlighting the Super Smash Bros. Ultimate icon on the Home Menu. Pressing the on your controller. Selecting Software Update and then Via the Internet . Super Smash Bros. Ultimate -NSP--Update 13.0.2-...