Something that greatly differentiates the Fire TV Cube from the Fire TV 3 is the Cube's Micro USB port and the official support for expandability that comes with it.
OTG Cable to Ethernet Adapter for Fire TV Cube, Fire TV Stick Lite 2020, Echo Show (2nd Gen), Micro USB HUB with Power : Electronics
Flirc Fire TV Edition - Flirc
4 in 1 Ethernet Adapter and 3 Ports USB OTG Hub for Fire TV Stick 4K/Chromecast/Google Home Mini/Raspberry Pi Zero and Other Streaming TV Sticks,Micro USB OTG Cable HUB with Powered
Flirc Fire TV Edition - Flirc
OTG Cable to Ethernet Adapter for Fire TV Cube, Fire TV Stick Lite 2020, Echo Show (2nd Gen), Micro USB HUB with Power : Electronics
Everything you can do with the Fire TV Cube's Micro USB port — Ethernet, App Storage, External Drives, Peripherals, FLIRC, OTG, and more
Any USB peripheral can be added to your Fire stick and allows the transfer of photos, videos, documents and other data between the device and external
OTG Cable Adapter for fire TV Stick 4K/Max/Lite/Cube,Android Phone/Tablet,fire Stick Memory Expansion/External Storage Expansion Adapter,Micro USB
Yonisun Micro USB Host OTG Cable with USB Power for Samsung/HTC/Nexus/Lg Phones and Tablets : Electronics
AFTVnews, Fire TV & Fire TV Stick News, Guides, and Deals
【Expansion Capability】Use this micro USB OTG adapter to add keyboard, mouse, U disk, USB flash drive, USB card reader, USB ethernet adapter and other
AreMe 2 Pack OTG Cable Adapter for Fire TV Stick 4K, 90 Degree Left Angle Powered Micro USB to USB OTG Adapter for Android Phone Tablet and More Host
Control your Fire TV with almost any remote. Compatible with Harmony Flirc’s easy-to-use software walks you through the entire pairing process and works on Windows, OSX and Linux Simple connection. Plug directly between your Fire TV and the USB power cord As fully featured as the original Flirc USB in an all new body Flirc Fire TV Edition is a universal remote control receiver. It allows you to pair any remote control with your computer or media center.
Flirc USB Fire TV Edition
The different Micro USB OTG Adapters and Accessories that work well with the Fire TV Cube
Accessories compatible for Fire Stick Lite 2020, Fire TV Stick 4K, Fire TV Cube (1st gen), Fire TV Cube (2nd gen), Fire TV (3rd Gen, Pendant Design),
OTG Cable to Ethernet Adapter for Fire TV Cube, Fire TV Stick Lite 2020, Echo Show (2nd Gen), Micro USB HUB with Power
Accessories compatible for Fire Stick Lite 2020, Fire TV Stick 4K, Fire TV Cube (1st gen), Fire TV Cube (2nd gen), Fire TV (3rd Gen, Pendant Design),
OTG Cable to Ethernet Adapter for Fire TV Cube, Fire TV Stick Lite 2020, Echo Show (2nd Gen), Micro USB HUB with Power
Oassuose 3 Pack OTG Cable Adapter for Fire TV Stick 4K Max/Cube/Lite,Powered Micro USB to USB OTG Adapter Compatible Android Smartphones,Tablets,Host Devices etc : Cell Phones & Accessories