Ranger Outpost remote file access
We're using a product called Ranger Outpost for students to access their files, staff can use VPN or Outpost, it's up to them.
Outpost comes with either a yearly license or an outright purchase and was 500gbp at the time we bought it. Link is below if it's of any use.
One thing to note, it has to be installed on a domain controller, something I wasn't happy about...
Sentinel Products Designed for Education | Ranger Outpost
Jonathan Haddock <><
Network Manager (and Webmaster)
Barton Court Grammar School