PS4: How to Digitally Upgrade Your PS3 Games - YouTube
Backwards Compatibility - PlayStation 4 Wiki Guide - IGN
Amazon.com: AC Power Cord Compatible Sony PS3 Slim / PS4 Slim Playstation 4 / PS5, Xbox Series S, Xbox Series X, Xbox One S/X Game Console Power Supply Cable Replacement : Video Games
Amazon.com: USA GEAR Console Carrying Case - PS4 Case Compatible with Playstation 4 Slim, PS4 Pro, and PS3 - Customizable Interior Stores PS4 Games, PS4 Controller, PS4 Headset, and More Gaming Accessories (
Why PS4 Doesn't Have Backwards Compatibility and Xbox One Does. - FULLY EXPLAINED - YouTube
Do PS4 Controllers Work on PS3? How to Connect a PS4 Controller to PS3
How to Play PS3 Games on a PS4 With PlayStation Now
Sony: PS3 and PS4 cross-play is 'technically possible' (update) - Polygon