I am having the same problem exporting a feature layer (hosted) to a File GDB. One service has a about 1000 points with some of them having picture attachments, the other literally has 1 point with one picture. I either get a generic error exporting to file GDB or an error that says not enough disk space. there is about 600 credits in our account now, so that shouldn't be an issue.
I've tried it in both internet explorer and Chrome, same error.
I looked for the "create replica" option on the Rest service page, but that option does not exist.
Any suggestions?
Thanks