After first time formatting of 3TB HDD (single disk) using D-Link DNS 320 as "Standard" RAID type (using very hardware soft via HTTP GUI) got 732 GB free space available.
There are no other options for single disk RAID configuration available in "Disk management tool".
According to documentation, as for me, I should have all of 3TB disk space without any RAID enhancements.
What am I missing? Could it be some kind of hardware issue, how could I verify?