The string you provided is a specific file naming convention used by the website Nintendo Switch
BASE: This term can have multiple meanings depending on the context. It could refer to a base in a general sense, a database, or a specific location. FATSTYNREMSTRD--USA--NSwTcH--BASE--NSP-Ziperto....
BASE: Specifies that this is the core game file, excluding updates or DLC. The string you provided is a specific file
Online Bans: Using modified files or custom firmware while connected to Nintendo servers can result in a permanent console ban. NSwTcH N$witch Nintend0 Sw1tch
The name is broken down into specific metadata tags used by release groups to categorize the software:
BASE often distinguishes the live operational data from temporary "Work" or "Temp" tables. It signifies that this record represents a finalized state of the transaction.