Will not bak up contacts – U-Drive Review

Works good with backing up photos. Transfers from iPhone 6 very fast using the GMYLE uDrive mini with a 3.0 USB on oboist end. Had to take my phone cover off as the lighting end would not fit otherwise. I also connected to my drop box account without problems. The instructions are pretty limited. I am experiencing a problem with backing up contacts. The app has long wide slide buttons that turn pale green with options selected and ready to be used. My option for backing up contacts stays a pale red and when I try to back up contacts it flashes and brings me out to desktop of phone. Trouble shooting gives nothing on this case and instructions say nothing about the button colors. Trial and error. My main reason was photos and with that I'm happy.
Review by Trailwinder50 on U-Drive.