Volumio 2.699: Library not scanning fully. Data not stored.

RPIB3+; Boss DAC 1.2, QNAP NAS via SMB from MAC Pro.

Unable to fully scan 1.2TB music database. Randomly hangs.
Scanned data does not get saved - no recall on power up.
I’ve reformatted two SD cards (32GB & 64GB); reloaded latest Volumio images twice; installed and run many times over the last several days with no joy to be had on my end.
I’m a hardware guy with minmal knowledge of Linux needing some light at the end of this tunnel.
Thanks in advance.