The Asus X555L is a low budget laptop that came out in May of 2015. The model depicted in these guides is X555LA-SI305041, an Intel Core i3 laptop designed to be affordable for consumers.
Similar model numbers: X555LB, X555LD, X555LF, X555LI, X555LJ, X555LN, and X555LP
All you probably need to do is reseat the drive, so open the computer (NOT PLUGGED IN!) and unplug and re plug in the drive... Let me know if it still does it...