backup unmounted .dmg
Is there a way with timecapsule to back up the .dmg file that is currently unmounted. I have a 5GB encrypted volume that sits on my main volume (in the documents folder) that I'd like to be able to back up each time without having to mount it. I'd like to be able to restore just the .dmg file when needed.
Right now, only the files inside the volume get backed up when it is mounted. When it is unmounted, I don't see the .dmg file in the documents folder.
OSX Yosemite 10.10.2
Thanks!
MacBook, OS X Yosemite (10.10.2)