Jonathan Arbib

In OSX Open a Terminal window and paste this

defaults write com.apple.systempreferences TMShowUnsupportedNetworkVolumes 1

That will allow you to see (as the command says) unsupported Volumes in Times Machine. All you have to do now is ensure your drives stay mounted every time you boot up OSX.

TIP: This works best over LAN, unless you are lucky to be on a network with high upload capacity to your Samba Share.