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.
If prompted for a password, it is almost certainly ziperto.com (this is the standard password for that site). DIGISURV-(USA)-NSwTcH-NSP-Update103-Ziperto.rar
Navigate to the folder where you placed the file, select it, and choose 3. Important Considerations This file is only an update (Update 1
On your PC, open the new drive that appears and navigate to Drag and drop your extracted .nsp file into that folder. DIGISURV-(USA)-NSwTcH-NSP-Update103-Ziperto.rar