Teardown of Apple's New AirPort Extreme Reveals Hard Drive Slot, but No Connectors - MacRumors
Omnihil 3 Meter Long AC Power Cord Compatible with Apple Airport Extreme/Time Capsule - 2TB / 3TB and Express Power Supply Charger Cord (White) : Amazon.ca: Electronics
Expand your Apple Airport Extreme, Time Capsule, Router & Wireless NAS Storage with Icy Dock
Disk Performance - Airport Extreme vs. Time Capsule - Airport Extreme (5th Gen) and Time Capsule (4th Gen) Review - Faster WiFi
Apple AirPort is Officially Dead! Now what? - Linksys Velop Review - Terry White's Tech Blog
Using the AirPort Extreme to Share USB Hard Disks - AirPort Extreme