How to add USB storage and a wired network connection to a Fire TV Stick using a cheap Ugreen 3 port USB hub - then add a wireless keyboard and mouse.
New Fire TV Stick 4K Max Review - Read This Before You Buy
FireTV Stick + Ethernet + USB hub with external storage
Fire TV Stick 2 supports USB Storage, Keyboards/Mice, and Ethernet Adapters via USB OTG without Root
USB OTG Cable Ethernet Adapter for Fire Stick 4K TV Cube Max Lite, Alexa Show 2nd Gen, Show 5 and Show 8 : Electronics
Fire TV Stick 4K Max Review
UGREEN Ethernet Adapter for Fire TV Stick (2nd GEN) – Hatke
Bundle TV Stick 4K Cube Accessories - OTG Cable, USB Ethernet Adapter and Micro USB Charging Cord : Electronics
Fire TV Stick with wired Ethernet, keyboard, mouse and external storage
5 Best Chromecast Ethernet Adapters for a Wired Connection