i recently bought a new Sony a7-ii camera. the first time i have tried to import raw images taken with it (with an .ARW suffix) the program it says "preview unavailable for this file" then "the files are not recognized by the raw format support in Lightroom" i have the most up to date version i think 5.7. what do i do to get these files imported as raw files?
The Camera that you have is supported with the latest version of Lightroom, that is Lightroom 6/CC.
Please check the list of Camera Supported by Lightroom : Cameras supported by Adobe Camera Raw
You may use DNG Converter, convert the images and then import them as DNG in Lightroom .