USB Backup working in 4.1.5?

Newly built system...just continuing with now getting my USB drive set back up.
But, the external drive isn't being seen. No syslog messages, not listed in File Systems. When I go to set the Backup up, the dropdown to select the USB Backup drive is empty.

Is this maybe a known issue right now? (did a quick search and didn't find anything)

Yea, I've power cycled the external enclosure for the drive...and tried simply unplugging the USB cable and re-plugging.
So....I need to work on getting the USB drive recognized in the UI first then. Thanks.

Okay....so I apparently have an issue how with the PCI-USB3 card in the OMV box after going from 2.x to 4.x (fresh install of 4.x, not upgraded). So, I just connected the external drive using a USB2 port on the OMV system and it now sees the external drive.

Next problem though:
After seeing the new drive, I select to mount it. Here's the resultant syslog after doing this:

After that, I go into the USBBackup plugin and select a Shared Folder to manually backup. I get the little warning window and accept.
This is then what shows up in syslog after trying this: (The File Systems section then shows that the USB drive has been unmounted. This is 100% repeatable)

Okay...changed the name and retried the manual USB backup. Different error.

Only entry in syslog now is this:

Where else would I look for a blank space?
And yes, the USB drive does have data on it....it was also used as the USB backup drive when the system was running 2.x. I just assumed that after the installation of 4.x that I could re-use the drive w/o modification on the new system. No?

I've connected the USB drive to a Windows system. The drive name no longer has any whitespace nor do any of the root level directories of the existing files.