: Ensure your console is running Custom Firmware (CFW) like Atmosphere.
: Your SD card should ideally be formatted to FAT32 for stability, though this requires using USB installation for files larger than 4GB. 2. Recommended Installation Tools RETRNTMONISLND-(USA)-NSwTcH-NSP-Update104-Ziper...
There are several popular tools for installing NSP updates. is currently the most recommended for its simplicity and reliability. Method A: Using DBI (Easiest for PC Transfer) Connect your Switch to your PC via a USB-C cable . Open the DBI application from your Switch's homebrew menu. : Ensure your console is running Custom Firmware
the RETRNTMONISLND NSP file directly into that window. DBI will handle the installation and any required version resets automatically. RETRNTMONISLND-(USA)-NSwTcH-NSP-Update104-Ziper...
: Verify you have updated Sigpatches installed, as updates may not launch without them.