This seems like a simple 'what tool to use for x' question, but it's more general. I'm rapidly running out of ideas, so I hope to get some insight here.
We have a customer that has employees with Windows laptops that never plug into the LAN. All they use is constantly changing and intermittent Wi-Fi. How would I backup these laptops? I need a tool that can deal with connections that drop-out and ideally, that can sync back to a new laptop (when the laptop gets replaced).
Programs like Dropbox and Google Drive come to mind, but that's not possible for legal reasons; the data has to be stored on private hardware. A private cloud would work, but the options are limited. One that comes recommended a lot is Owncloud, but by now, I reported dozens of bugs and we're still getting the most scary data corruption. I've decided its not to be trusted.
Traditionally, before the 'cloud', I simply setup a Samba server that used rdiff-backup to backup remotely. This works perfectly. But, when people never connect to the LAN, this becomes impossible.
How do people address the issue of backing up these kinds of laptops, preferably with tools that work over SSH and do some kind of checksumming to make sure the data is intact?