BE2014 to USB - Error code: E000FE49

Hi All,

I'm running BE 2014 on a Windows 2012 R2 HyperV server. I'm backing up 2 virtual servers, 1 is a DC, DNS, DHCP and file server. The other is a Terminal server.

I've set it do a full backup of each virtual server to USB drive. it appears to backup all the data on the file server but i get the E000FE49 error.

Job Log says:

Backup- VRTSRV::\\Server-HV1.domain.local\Hyper-V?Virtual?Machine\Server-VM-FS1
Error writing file data. Error writing file data. Error writing security data stream. Error writing security data stream. Error writing security data stream. Error writing security data stream. Error writing security data stream. Error writing security data stream.