I have also a serious problem in exporting survey data today. When I try to export to any format there is only about 0,1 sec notice “Project is being exported. Please wait” (I had to video it to be able read it in slow motion). I also tried to connect directly to the Reach, but in data/surveying/“folder” there is only .json and .geojson files. I want .csv.
I had first version 2.16.1, updated it to 2.16.2, but the problem is still there. Android is 6.0.1, phone Cat S60. Everything worked fine last survey (18.1.2019).
Have you already tried using browser version of ReachView to export survey project?
You just need to open any browser and type Reach IP in the address bar.