SultanBrunei,
I think you are confuse on the terminology, I strongly recommend some reading to understand it better before you make a final decision. Please check the link I provided earlier.
But will attempt a quick explanation:
redundancy: There is hardware and software. The MBL DUO would be hardware, while having copies of the same files at different devices/drives is software. This can also be referred as sync/mirror sometimes.
Backup: This is software, now a true backup app, you will NOT see the list of files containined on the backup file. Unless you restore, which then you will open the backup file and select the files to restore.
my .02 cents, keep the files on whatever PC you want, then run a backup which will place the backup file on the MBL.
You would avoid confusion with the actual files.
All of the options to backup and/or sync your data are not dificult at all, once you get the hand of it.
BTW, data recovery as mentioned earlier, it is expensive and NOT guarantee 100%.
