Lightroom Mobile Maximum Available Export Size
I take full size RAW images on my 5D Mark IV, import them into LR Desktop, put them into a LR Mobile synced Collection, edit the files in LRM and export "Maximum Available" size, and end up with files that are 700-1000KB. So a file that starts off life as a 30MB file is reduced to a file that is 1MB or smaller at the max available export size from LRM. I use this workflow often for journalistic work assignments and it's cumbersome to have to bring both my iPad and laptop to work to send a final product to the editors. And if I'm not at the office, I don't have a way at all to send full res files from the field without purchasing a separate wireless hotspot to bring with me on location.