Bootable USB drive .

[maherkassem]

I burned Ubuntu on my 2 Gig USB it is bootable but whenever I try to boot from it BIOS say booting from USB ...
and nothing happen. Do I need a Larger USB driver .

 

[webworkings]

If it is on the USB then you shouldn't need a larger USB. However, how you put it on the USB will make a difference.

 

[jsmithepa]

For compatibility sake, USB should be formatted as MBR.