Fire TV Stick 4K supports external USB drives and USB peripherals via an OTG cable

The Fire TV Stick 4K doesn't officially support connecting anything to it except 's Fire TV Ethernet Adapter, but, using an inexpensive OTG cable it's possible to use USB peripherals, such as keyboards and wired gamepads, as well as external USB drives.

For Fire Stick Usb Otg Port Adapter Cable 4k 2nd Gen Fire Cube & Fire Tv3

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Allows you to connect USB keyboard to Fire TV Stick, Fire TV Devices, LG Phones, Samsung Tablets, Compatible with devices that support OTG like

3-Pack OTG Cables Replacement for Fire-Stick 4K, Replacement for Fire-TV, Compatible with LG Samsung Android Phone Tablet Micro USB Host with

Cable Adapter For Firestick 4K Fire Stick TV USB OTG add Keyboard USB Q2N5

Fire Tv Stick Otg Cable

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Fire Tv Stick Otg Cable

Ethernet Adapter Replacement for TV Stick 4K Cube, Google Chromecast and Micro USB OTG Cable HUB with Power

Turn Your TV Into A Computer

How to Add external storage to your FireTV Stick via USB Drive - Dignited

For Fire Stick Usb Otg Port Adapter Cable 4k 2nd Gen Fire Cube & Fire Tv3 J0K0

Connect USB devices and Ethernet to your Fire TV Stick!

Firestick Ethernet Adapter for Increased Speed & Connection

Fire TV Stick 2 supports USB Storage, Keyboards/Mice, and Ethernet Adapters via USB OTG without Root