12-30-2019 11:45 AM
12-30-2019 12:48 PM
Welcome to the Insignia community. Thanks for reaching out about this, and for keeping your televisions up to date.
You can find full details on how to update the firmware here. In short, however, you'll want to format that drive as FAT32 and make sure that the television stays on throughout the process.
Please reach back out if I can assist you with anything else.