"Disk Almost Full" PMS on Ubuntu - not able to sync

All,

Running PMS 1.2.2.2857 and trying to sync. I get the "The disk is almost full (les than 10GB remaining)" error. My media is housed on a FreeNAS box, with PMS running on a separate VM (Ubuntu 16.04 LTS), mounted as CIFS.

Any help?

Thanks!