Network Backup Mount Location - Doesn't work with Dropbox Sync

Does anyone know where the Network Drive gets mounted? The one you setup through the GUI. I have a local SMB drive as my main HA backup but I discovered that my offsite Dropbox Sync stopped working because it’s only looking at /backup which isn’t the SMB mount for backup.

The issue is two-fold. 1) Where is the network drive mounted and 2) does anyone know a workaround to get Dropbox Sync to start looking at that location?

Thanks and Cheers!