Oppw3-de-nswtch-[base]-nsp-ziperto.part1.rar

Since the base game is likely larger than 4GB, you cannot simply copy it to a FAT32-formatted SD card. Instead, use a USB installation method:

: The software will automatically pull data from all other parts to create a single .nsp file (the digital game format for Switch). Step 3: Install the NSP to Your Switch OPPW3-DE-NSwTcH-[BASE]-NSP-Ziperto.part1.rar

Ensure every part has the except for the part number. Since the base game is likely larger than