This was professionally refurbished and was in all working condition. The pin/clip for one of the legs came out and I can't put it back together.
2 batteries, all chargers, st16 controller, 4k camera, x real sense, pack.
I thought weird as well, I unzipped it on both PC and android table and saw all the same files. When I unzipped it on my Samsung tablet and copied the APK, I got the error, when I unzipped it on the PC and emailed the APK(again cant use my laptop to store on removable media), I got the error...
I had to copy the zip to the st16 and extract the files on the st16, then the apk installed fine. My laptop doesn't allow me to use external media(work restriction) and when I extracted it on another android tablet and copied it to the sd card somehow it got corrupted.
This is a great program...
I did, downloaded on another android tablet, extracted it to a separate directory, copied to SD card, enabled install from unknown sources. If i have never installed before I should not be using the update, but I did try both and got the same error.