Installing pirated content or using CFW carries risks, including a permanent ban from Nintendo Switch Online services. Always use a "DNS MITM" or "Exosphere" setup to hide your serial number from Nintendo's servers. 4. How to Install the NSP File
This appears to be:
: NSP (Nintendo Submission Package), which is the standard format for digital Nintendo Switch games. TESVSKYRM--USA--NSwTcH--BASE--NSP-Ziperto.part3...
If you encounter errors while downloading or installing software on the Switch, consider these standard fixes: Corrupt Data Installing pirated content or using CFW carries risks,
: The name of the website/community where the file was originally hosted or distributed. Not ... - Nintendo
General Problems with Downloaded Software (Freezing, Not ... - Nintendo