denababy Ah yes. Those jpg/jpeg files are simply thumbnails used as a preview when browsing your images on the ASIAIR with the ASIAIR App.
The .FITS files are what you're after. Make sure you enable view file extensions in Windows File Explorer and change the view to List or Details view (and adjust the column width) so that you can always see the file extension of the files you are looking at.
There should be something similar for Mac OS as well.