The problem of recording 4k video with a 1080p output

[Kevin254]

The Settings are 4k and I used external 3.0 usb flash drive. When uploading, it was automatically compressed into 1080p, but why stored in the usb flash drive 1080p, how to export 4k video?

 

[SpaceXtt]

That should be a monitor or a TV that doesn't support 4k

 

[PeterWint]

Connect the usb drive to the computer