In further troubleshooting... I noticed that when I ran the mount command to see what was listed, the directory for my incoming files was listed as a mounted file system as if it were a separate physical disk.
I now see that for each shared resource in OMV, whether it's a shared drive or folder, is using file system labeling methods (shown as dev-disk-by-...
You mount the filesystem with ntfs. This driver provides only read-only access according to Debian NTFS. You have to install the third generation NTFS device driver with:
rpi ~$ sudo apt install ntfs-3g
and then mount your filesystem with FSTYPE ntfs-3g. Then you have read/write access to your mounted device.