For those unfamiliar with RAR files, they are a type of compressed archive file used to package and distribute data. In the case of the NSPJP update 1.34 RAR patch, the file contains the necessary data to update the game to the latest version.
, likely in the context of file distribution or "better" stability improvements. Overview of Version 1.3.4 super robot wars 30 nspjpupdate 134rar better
: Improved the overall performance and fixed minor graphical glitches on the Nintendo Switch. Text Refinement For those unfamiliar with RAR files, they are