Choice of NAS

[Enquiries]

Hello,

I just made the decision to buy a NAS.
Wants:
- regular backups(pictures, data, contacts etc.) from my Android and iOS device for different users without giving them access to all data on the NAS
- potentially media streaming in the future.
- I want it to be secure so I can connect remotely and replace dropbox and online storage.
- raid capability
- quiet

Nice to have:
- posibility to have vitual macine as I am learning linux
- VPN when travelling abroad
- upgradability and futureproofing capability
- software for sorting and tagging pictures
- managing duplicate files
- small form factor
- value for money