Digisol Router Port 80 Setup

I need port 80 opened on my Digisol DG-GR1321 so I can reach a small HTTP share that serves my video and photo library from outside my network. No authentication or extra encryption is necessary; an openly reachable connection is acceptable for my use-case... (Budget: ₹600 - ₹1500 INR, Jobs: Computer Security, Firewall, Linux, Network Administration, Network Monitoring, Network Security, System Admin, Technical Support)