Is your Dropbox set up
- folder called Apps
- sub folder RoosMagic
- transferred a copy of current file with .rmgc ending
Just to re-emphasize, the above setup is the one that is supported and works. I use iPhone instead of Android, but I believe the Dropbox technique works the same way on either kind of smartphone.
It absolutely has to be the rmgc file, not the rmgb file. On Windows, use Windows Explorer to copy and paste or drag and drop the rmgc file from wherever it is into the RootsMagic folder under the Apps folder under the Dropbox folder. I don't know how Dropbox works on a Mac. But if you can get the rmgc file into the right place in Dropbox, then the mobile app doesn't know or care if the file came from a PC or from a Mac.
I already had the Dropbox app on my iPhone, but if you don't then I believe that it's necessary to install the Dropbox app on your iPhone or Android. Make sure the Dropbox app can really see your Dropbox files. Having done all that, it should work. And having done all that, its actually quite easy moving forward to update the database on your smart phone. Just repeat the process of copying and pasting or dragging and dropping your rmgc file from wherever it is into the RootsMagic folder under the Apps folder under the Dropbox folder. None of the other steps have to be repeated.