If prompted for a password, it is almost certainly ziperto.com (this is the standard password for that site).
Once extracted, you will have a .nsp file, which is the actual update package.
How to Install NSP Files from SD card to the Nintendo Switch using Tinfoil!!! DIGISURV-(USA)-NSwTcH-NSP-Update103-Ziperto.rar
This file is only an update (Update 1.0.3). It will not work unless you already have the base Digimon Survive game installed on your system.
Are you installing this on a or an emulator ? If prompted for a password, it is almost certainly ziperto
Ensure your Switch's custom firmware (CFW) and system firmware are up to date. Newer game updates often require a minimum system version to run.
Wait for the transfer to finish; the update will automatically install to your console. Copy the .nsp file onto your Switch's SD card. Open Tinfoil on your Switch and go to "File Browser." This file is only an update (Update 1
To use this update on a modded Nintendo Switch, you need an installer like (highly recommended for simplicity) or Tinfoil . Using DBI (USB Install): Connect your Switch to your PC via USB. Open DBI on your Switch and select "Run MTP Responder."