.CSA File Extension

Data file saved by Agilent PNA Code software; stands for "Cal/State/Archive" because the Calset data is archived with the state; stores data collected from measurements performed with the software.

A CSA file is a game archive used by Star Stable Online, a horse adventure game. It contains multiple game data files, which typically include PME, PTE, and PCO files. CSA files are compressed and encrypted to reduce the size of the game data files and protect them from being modified.

You will most likely only encounter CSA archive files if you play Star Stable and are looking for game data files in the Star Stable Online installation directory on your computer. The CSA files are not meant to be manually opened by a user. Instead, the CSA files are referenced by the game to load content.

CSA files can be found in the following directory in Windows:

C:\Program Files\Star Stable Online\PackFiles