Honda limits the image to a maximum 2mb file size and recommends a maximum image of 1920 by 936 pixels in either bmp or jpeg format so adjust photos on a computer before putting them on a usb drive. When choosing a picture to display on your hondas wallpaper its important to remember the photo will be displayed in landscape so photos taken in portrait may not be a great fit.
How To Change The Wallpaper On 2016 Honda Civic