I bought the DNS-345 I put 2 hard disk Disk1 Seagate ST3000DM001-1C1 and Disk2 HDT721010SLA360 Hitachi firmware is 1.01. When I copy the data to any disc very often get an error disk is full, but the disc has a lot of free space and when I press the skip copying continues. I'm not sure if my data is safe and that are тhеy properly recorded?