I haven't found anything, that Dropbox does that the NAS doesn't. Maybe there is some marginal function, I don't know. But is that hypothetical marginal function worth the 900% price premium (per year) plus reduced privacy?
How do you do offline syncing and sharing of folders with people outside of your network? Having to manage a bunch of VPN accounts for outside users seems like a major pain and getting them all set up with OpenVPN seems like an even bigger pain.
Having to manage VPN accounts for everybody I want to share a folder with sounds like a huge pain. Especially if I have to go ask the VPN admin each time. And I'm still curious how you do offline access and syncing to local disk.
So you're not actually doing everything (or even most things) that Dropbox does. I mean we also have a file server with a several TB of disk and gigabit links and VPN and all that jazz at the office, but that is in no way a replacement for what Dropbox offers.
I haven't found anything, that Dropbox does that the NAS doesn't. Maybe there is some marginal function, I don't know. But is that hypothetical marginal function worth the 900% price premium (per year) plus reduced privacy?