ASUS X555 X555L Enter BIOS USB Boot Device
How to enter the BIOS and select Boot device.
It can be useful for other laptops Asus X555 series.
X555LJ, X555LN, X555LP, X555SJ, X555UA, X555UB, X555UF,
X555DA, X555DG, X555LA, X555LB, X555LD, X555LF, X555LI,
X555UK, X555YA, X555YI.