The file refers to the Nintendo Switch version of The Binding of Isaac: Afterbirth+ .
Unlocking Nintendo Switch Games: OSC, Emulators, And NSP Files - Ftp TBOIA_-(USA)-NSwTcH-[BASE]-NSP-Ziperto.rar
The Switch port is widely considered one of the best ways to play this modern roguelike classic due to its portability and content. The file refers to the Nintendo Switch version