The Handheld synchronization would be enough just for basic media file duplicating. I am not sure if it works for all file types that can be used in MC. It doesn't copy e.g. cover art and files, which are external to MC library. It doesn't make any sophisticated file comparisons from drive to drive.
That SyncBack looks excellent and it worked fine for a few test files. Does anyone have experiences about how well it can handle tens of thousands files and hundreds of gigabytes of data?
Also, the forthcoming pro version looks promising:
http://www.2brightsparks.com/syncback/sbp-features.htmlMy Dantz Retrospect Express (a bundle version, which comes with Maxtor drives) is not that comprehensive in options, but it does the work as it should. It is very quick, works very smoothly and feels stable and professional. (
Dantz has made backup software for decades and the server versions are prized up to $3500.)
Retrospect Express does not have the option to check and update the drives in both ways at once. If the files are changed in both drives I have to let it work twice, once in both directions. Though, this is more or less speculation since I don't usually edit the files on my backup drives.