storage "router" sounds like some funny marketying hype, try looking for a network drive that you can subnet. We generally don't support file sharing or VPN remote access as there are some security issues that are a tad risky.

The off the shelf products come with some built in stuff, plug into your internal network, they may support VPN, but it depends on the specifics that the MFG decides to include, They may also include stuff designed to provide "other" access, for data collection purposes, if you catch my drift.

Some of our members use network storage devices, but storage router.... ??? sounds too much like an FTP server.

If you know how, you can setup a simple FTP server and use it with strong passwords, disable any unnecessary accounts, and use a good firewall.