Here is how to add more external storage to your FireTV stick using a USB Drive.
Fire TV Stick 4K supports external USB drives and USB
Add External Storage to your New 2020 Fire TV Stick 3rd Gen - Oct
How to manage storage space on Fire TV and fix critically low on
How to Add More Storage to an Fire TV Stick
How to Connect a Fire Stick to a USB Drive
Ethernet Adapter
🔥HOW TO ADD STORAGE TO the NEW FIRESTICK
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Fire TV Stick with wired Ethernet, keyboard, mouse and external
How to Connect a Fire Stick to a USB Drive
Fix Problems Expanding your Firestick Storage!