What I like most about BT sync is how it transfers files in a series of much smaller bits, so that I can avoid the headaches of interrupted file transfers. I also like the security and the ability not to sync everything to all devices. Here're the devices I want to incorporate: an NAS to hold everything; my laptop, my tablet, my phone, and the same for my wife and daughter. Each of us has content we would share with everyone else -- video, audio, and ebooks. And content we would consider private. And I know for myself at least that I would keep a lot of the "shared" and private content only on the NAS. 1) I know there are many NAS partners for BT Sync. But are there any differences in BT Sync for the user (besides installation) from one device/brand to another? I have not yet chosen which NAS to get. But I think I want at least two bays with 4 TB each and USB 3.0 ports to add more drives later. 2) If my private content is naturally in an NAS folder that only I can access, will BT Sync be able to access it? Or does BT Sync on NAS devices only access shared/public folder content? For that matter, does any content need to go into an NAS's shared/public folder -- can't I share it in BT Sync with any user, regardless of the NAS folder type? 3) I'm assuming I'll want three paid licenses for my family. Does that sound like the right way to go? 4) I know the mobile devices will only sync selected files by default. I can do that with my laptop, too, right? My plan is to have at least one high-level folder on the NAS that will essentially hold all the contents of "My Documents" on the laptop. That folder will sync between the NAS and my laptop. But I want to be able to selectively sync other less-frequently needed content which I will organize under other high-level folders that I keep on the NAS, but only access when desired. Any advice, answers, comments, and suggestions welcome, including recommended articles/links, etc.