I use Idrive w Isync and Novabackup small business. I also have a large NAS onsite at my home that I sell data storage to, its a large drobo and i use the novabackup NAS installer to set that up. Both options are bare-metal friendly, Idrive goes as far as allocating x% space to each user, so if you import 20 users from the AD and then set them up with there own Idrive desktop so they can backup and retrieve files themselves if needed. I also set each user up with a personal sync and there does not seem to be a cap on the sync ATM. You also have android and ios Idrive installers, along with https access to the manager page.
Been my own MSP for almost 5 years now and those are my 2 go to solutions, I also have a large handle on data recovery and rebuilding raid systems to transfering logical local machines to hyper v or vmware nodes. For all my data recovery i use Active@data suite and it has every tool + that you could ever use. I have pulled up data off a personal laptop of a friend who had reinstalled and formatted the drive many times. It is very impressive.