Avoid dragging files directly into the SD card via a computer file explorer, as this is prone to write errors. Instead, rely on direct MTP (Media Transfer Protocol) installations:
For modded consoles, you can install NSP updates using homebrew tools such as Awoo Installer DBI Installation (Recommended) Connect your Switch to your PC via a USB cable. DBI application from the Homebrew menu on your Switch. Run MTP Responder to have your Switch appear as a drive on your PC. On your PC, drag the update NSP file into the "Install NSP" folder of the Switch drive. Combining Files dr kawashimas brain training switch nsp update work