[Mashiro]

@youssefbasha

Your notebook is probably legacy only, right? I mean it probably has a normal BIOS and no EFI or UEFI?

How did you create the USB thumb drive? MBR mode for Legacy or MBR/GPT for UEFI? Might be that you created the USB thumb drive using the wrong method for your machine.

Is the USB thumb drive big enough and in good state?

Otherwise I have no idea. I have created so many different USB thumb drives for OS installations based on all kind of Windows versions, many Linux distributions including Xubuntu and even some Android or ChromiumOS based OSs but never experienced this kind of issue.

USB HDD is in most cases the right option during boot. It basically refers to USB thumb drives but also to other USB storage devices such as HDDs and etc.