Changing both lock and start screen to default included images didn't solved the issue. However, it helped improve the stuck position from 95 to 98% rly:I had this problem as well, but someone pointed out a solution for me: your lockscreen photo. If your lockscreen photo is so high of quality that it's greater than 1 MB, it won't back up, as the backup algorithm can't seem to handle it. I changed my lockscreen and it backed up flawlessly. Try that. If it doesn't work... then I got nothin'
Changing both lock and start screen to default included images didn't solved the issue. However, it helped improve the stuck position from 95 to 98% rly:
I changed my lockscreen from Amazing Weather HD to a simple photo, and the backup progress went up from 96% to 100% but for some reason backup still fails. Any other suggestions?