Windows Phone 8.1 dev preview back up problems

[Bataar]

So I'm trying to do a back up of my Lumia 1520 before downgrading it back to 8.0 to get the full Cyan/8.1 update. However, when my back up is running, it will get to 96% complete and then give me the following error:
"There was a problem backing up your settings. Try again later."

Has anyone else had this problem or know of a work around? I've restarted the phone and made sure no apps were running in the background and am still getting this error.

 

[xandros9]

I don't know what else to say other than to try again later. Might need another go or two.

 

[hotphil]

You need to delete existing backups, then retry and it will move past 96% then.