How To Use Usb On Chromebook. See this for further reading Chromebooks getting support for USB. The second part on how to enable USB boot on Chromebook is stated with step-by-step guidelines below.

Navigate to the CloudReady bin file you just downloaded and extracted. Chromebooks include only a small amount of internal storage. Now click on the settings icon in the top right and now you have to select use the local image.
If your Chromebook has an available SD card.
Select Use local image on either utility. Secondly read the product description carefully to see whether the Chromebook has a USB-A. Plugin the USB Drive. Linux on a Chromebook is fantastic but with ability to access USB from Linux on Chrombook it gets even betterHardware LinksChromebooks on Amazon.

