This update focused on quality-of-life improvements for competitive and local play:
While both main Taiko titles on Switch have a "1.2.0" version, the updates brought significant features to both:
This was the patch that originally introduced the online competitive battle mode to the game. TAIKONOTRFES-(USA)-NSwTcH-NSP-Update120-Ziperto...
This is a "Nintendo Submission Package," used for installing games, updates, or DLC on the Switch.
Fixed Don-chan’s movement glitches and corrected the music score for the song "Funiculi, Funicula" . For Taiko no Tatsujin: Drum 'n' Fun (2018) For Taiko no Tatsujin: Drum 'n' Fun (2018)
The string you provided refers to a specific for Taiko no Tatsujin . Based on the file naming convention, this most likely corresponds to Taiko no Tatsujin: Rhythm Festival (the 2022 release) or the original Drum 'n' Fun (2018), specifically the USA region, version 1.2.0 update in NSP format. Update Highlights: Version 1.2.0
Taito Milestones 4 Switch NSP/XCI [UPDATE] Download - Ziperto specifically the USA region
If your file is for the older title, Version 1.2.0 was a major content drop: