I have been using ABB since I got my DS-920+ last spring. The past couple of weeks I have been getting backup failures some of the automated backups. The past few days it has been a 100% failure rate. I get an "unknown internal error, contact Synology" message in the logs. I have been trying manual backups and it fails within a minute or two with the same error. I have removed/reinstalled ABB and the backup agent on a couple of my windows machines. I upgraded my OS from 6.2.3.xxx to 6.2.4.xxx. I've restarted my network and computers several times. Is there anything else I can try or look at? Thanks!!