Believe it or not, the setup you see in the above picture works. The Fire TV Stick 2 supports OTG USB cables out of the box without needing to root the device or change any configuration settings.
How to use the System Picker Files app in Fire OS 8 on the 2nd-gen Fire TV Stick 4K & 4K Max to grant access to External USB Storage Drive Folders
AuviPal 2-in-1 Micro USB to USB Adapter (OTG Cable + Power Cable) for Fire Stick, Playstation Classic and More - 2 Pack : Electronics
2 in 1 USB Power Adapter and OTG Cable for Fire TV Stick,2nd Generation USB Power Cable Cord for Fire Stick.TV's USB port to power streaming devices(Eliminates The AC Outlet and Power Cord) : Electronics
Fire TV Stick 4K Max fully supports External USB Storage with ease
2 in 1 USB Power Adapter and OTG Cable for Fire TV Stick,2nd Generation USB Power Cable Cord for Fire Stick.TV's USB port to power streaming devices(Eliminates The AC Outlet and Power Cord) : Electronics
This 4-Port USB Switch is an excellent choice to share 4 USB devices between two computers. It's ideal for sharing a printer or scanner in a small office environment. It's also great for use at home if you have multiple PCs or Macs.
UGREEN USB Switch Selector 2 Computers Sharing 4 USB Devices USB 2.0 Peripheral Switcher Box Hub for Mouse Keyboard Scanner Printer Pcs with
Connect USB devices and Ethernet to your Fire TV Stick!
OTG Cable - Supercharge Your Firestick with this Handy Tool (2022)
This all-in-one adapter is the easiest way to add Ethernet to the Fire TV Stick
How to Set Up and Get the Most From Your Fire TV Stick
Fire TV Stick 2 supports USB Storage, Keyboards/Mice, and Ethernet Adapters via USB OTG without Root
Fire TV Stick with Alexa Voice Remote (includes TV controls), Dolby Atmos audio - 2020 release