I don't know whether it would be possible (and, unfortunately, I don't begin to have the knowledge to do this myself), but it would be wonderful if there were a package that automatically backup up to an attached USB HDD. I've just gone through the long and painful process of transferring files to a USB HDD ½TB of files on an HDR-FOX T2 drive that I am returning for repair. And it occurred to me that it would be a disaster (at least, for me personally) if I had lost all that material - which I would have done if the Hummy had failed completely (since the encryption coding is specific to individual machines). What I am envisaging is leaving a USB HDD permanently connected to the Hummy, and: for all new files to be automatically transferred to the USB HDD at (say) 1 a.m (optionally) for all files deleted during the previous day to be automatically deleted. Or something similar, along these lines. I know that this could be achieved manually, but it would be very time-consuming, and very few people would be disciplined enough to stick to it. The most effective backup methods are set-it-and-leave-it.