I have a 4 GB DDR3 soldered RAM on my laptop.ASUS recommended maximum RAM is 8GB. How do i upgrade to the asus maximum recommended RAM? CAN I JUST BUY 8GB DDR3L-1866 SODIMM or 4 GB DDR3L-1866 SODIMM?
The X555LA is just a specific configuration under the X555L series. All the X555L models have similar motherboards with one memory bank for modular memory, if I'm not mistaken.
I'm guessing OP has the X555LN model, based on the on-board RAM.