How to Adding second HDD to a Asus K53SD laptop?
my Laptop is Asus K53SD
how to Adding second HDD and Ram to a Asus K53SD laptop?
Here is a video which shows how to replace the HDD with a SSD and re-install the HDD using a caddy in the DVD drive bay in an Asus K53SD laptop.
The video commentary is in Russian but the video is self explanatory.
Looking at the video it appears that the RAM slots are next to the HDD (shown near the beginning of the video during the removal/insertion of the HDD/SSD).
The specifications for the laptop state that it has two ( 2) SO-DIMM sockets for memory handling up to a total of 8GB SDRAM - DDR3 1333 MHz.
Hopefully this is of some help