Video cache size The Limit video cache size option lets you set a precise limit for the size of the video cache. This is all to do with the video playback performance when viewing and editing video files in the Library module. note the camera raw cache folder is stored in the adobe camera raw folder located in the Library/Caches folder (mac) or Username/AppData/ Local/Adobe/Camera Raw folder Interface preferences The Interface preferences are shown below in Figure A.12. (pc). note that the camera raw cache folder shares its data between camera raw in photoshop/Bridge and Lightroom. since version 3.6, the camera raw cache has been making the camera raw cache files more compact. this means that you can now cache a lot more files than was the case before within the limits set for the camera raw cache size.