The owners manual states that the thumbdrive has to be formatted in either FAT16, FAT32, or exFAT. It also states thumbdrive. usb adapters won't work. Although some appear to be using sd cards.
I"m using a thumbdrive. FAT32 is the only format i've been able to make work. FAT16 isn't even an option in windows 10. exFAT does NOTHING. I also can't use a mix of things. I can download music. And that seems to override my pics. As those won't load up if also downloaded together with music. When you plug the drive in, it automatically pulls up. If all you have is music. You can exit out to radio. Hit source button and select usb. If all you have is pics. Those automatically load up as a file selection. But if you exit to radio. You CAN'T hit source and select usb. It won't light up. Least it didn't for me anyways. Have to pull drive out and reinsert for pics to pop up.
Youtube vids say videos are playable in mp4 format. But none of the youtubes described the cruze. They were all higher end models and pickups. So far I'm not having any luck on videos. I"m pretty sure they're mp4 but i'm trying out some convertor software to see if anything will happen.