I have Lumia 1020 and I've been having this problem ever since the Windows 8.1 Update. My o/s version is 8.10.14147.180. Also today I noticed my clock was wrong, set it to auto update and this turns 24hr off, can't have auto time and 24-hr clock. I've had to manually sync my Microsoft account several times and clock , wondering I this is related. I've turned photo and SMS upload off and still get the backup error. just says try again no error code. Have even removed lock image, temp files, restarted, soft reset, sync and backup - no luc????
Help- I want the cyan update but need to be able to backup my phone first.