Any “backup” software will have the backup data on some kind of format only that program can read.
And no MBL does not have that capability. However…
What you want, or at least it sounds like you do, it is folder sync or mirror program. In a few words you mirror from folder-A to Folder-B, being one of them, a mounted volume on MBL. Programs work differently, some will watch the folder and as soon as a new file is detected or edited, it will be copied.
This is an example: http://download.cnet.com/SyncTwoFolders/3000-2242_4-99079.html
rsync sub-optimal!!!?? Sorry I beg to differ, it is the best you can do for build-in commands/tools, robocopy being the equivalent on Windows.
Now, no need to do it manually, set it as a cron job to run anytime you want, multiple times a day, every hr, once a day, etc etc.
I run a rsync script manually, all I do is double click and it runs on my Mac. Have the same using robocopy (batch) for Win.
At some point had both on a schedule (cron/scheduler) but it was overkill for my needs, hence now I just double click on scripts to run them