How do I format the SD card on my Nextbase 122HD before a firmware update?
Go to the Dash Cam Setup Menu by pressing the Menu button twice while the camera is not recording, then select 'Format SD Card' and press the 'OK' button to confirm. This step is required before copying the firmware update file to the SD card. (Page 2)
From the official Nextbase 122hd Dash Cams manual, page 2
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