Diablo II: Resurrected normally requires an internet connection to "check-in" with Blizzard's servers. Users with modded consoles often use these specific NSP files alongside community tools (like Linkalho or JKSV ) to bypass this check and play offline.
The string [0100726014352800][v1310720] is a standard naming convention used in the Switch homebrew and piracy communities to identify specific game data:
This stands for Nintendo Submission Package . It is the file format used for games and updates delivered via the Nintendo eShop.