Hi Dima, mine might have been a Group Policy issue that was denying CD-ROM and USB drive access. I didn't have time to get a ticket going, etc. so just grabbed a blank CD when it threw a much clearer "access denied." Our Service Desk confirmed I wasn't in the group to allow CD/USB access. Once fixed I was able to continue burning to CD; I forewent the USB media since I had misplaced it anyways at that point (that worked and got my restore going). Many thanks though.
Veeam B&R v9
Dell TL2000 via PE430 (SAS)