Connection to NAS impossible now since Mountain Lion - why?

I access a Western Digital MyBookWorld II (White Light) (MBW) from my MacBook Pro via a wireless router. I use it as a NAS and as a Time Machine backup source. Up until recently it all worked fine, but now it "disappears" from Bonjour after a short while of being connected and does not stay connected properly. Because it is not connected via Bonjour, Time Machine cannot find it. The problems seemed to start after I upgraded to Mountain Lion, but I cant be certain.
If I access the MBW device drives via Finder when it is connected properly to Bonjour, then everything is OK, but after a while, something happens, and it disappears from Bonjour and the drives are no longer visible, but then they will reappear in Finder but in a different manner than normal (and at this point Bonjour is still not connected).
I can access the MBW device admin menus any time through Safari (via IP address 10.0.0.7) and I can do diagnostics etc and all seems OK. If I do a MBW device reboot from here, it reboots OK and will actually reappear correctly in Bonjour again, but only momentarily before disappearing off Bonjour as mentioned earlier.
Bonjour seems to work OK for another device that I have connected which is a wireless printer connected to my home network.
The MBW has the latest firmware, I believe. The auto-check tool says that its up to date. My Macbook is fully up to date on OSX 10.8.2.
I have raised this with Western Digital and they have written back telling me that "this situation is caused from the fact that your drive uses smb (samba) to transfer the files and Mountain Lion does not support samba."
Can you assist me by advising me what my be causing this problem?Is the Western Digital advice correct? Is it the device? Is it Bonjour? Something else?
Many thanks,
Kerrod.

Is the Western Digital advice correct?
No. The information is wholly wrong, and partially irrelevant. The wrong and relevant part is that the backup volume is exported via AFP. Otherwise you'd never see it in Time Machine at all. The rest is both wrong and irrelevant.
Is it the device?
Search this site for reports of fiascos involving Time Machine and third-party NAS devices, that one in particular.
If you want to back up with TM over a network, use a device supported by Apple. That would be either a Time Capsule (not an AirPort base station with a USB drive attached) or another Mac.
Network backup, even with Apple equipment, is slower and less reliable than backup to a locally attached storage device.

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July 18, 2012 · by Arthur Lockman · in Apple, Tutorials
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