u/Electronic-man-7900

Steps to get an ONN Android TV box to recognize a USB drive for TVMATE recording: First, enable developer options.
Go to Settings, then System, then About.
Scroll to Android TV OS Build.
Click 5 to 7 times until you see, “You are now a developer.”
Then, adjust the developer settings. Go back to Settings, System, then open Developer Options. Scroll almost all the way down. Set “Force Allow Apps on External” to on.
Scroll up and make sure USB debugging is off. Now format the USB drive.
Insert usb into the box,
go to Settings, then Storage, select the USB drive. Choose Erase & Format.
Let it finish.
If prompted about moving apps, choose Move Later.
Then to verify storage. Go back to Storage and you should see both internal and USB storage listed.
Then, to direct TVMATE to USB. Go to Settings, then Apps, then See All Apps, choose TVMATE, open Storage, and switch to the USB drive. TVMATE should auto-detect the external USB for recordings. No re-targeting needed
Best of luck

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