Asus R506A - Manual (Page 78)

78 Notebook PC E-Manual
Replacing the Hard Disk Drive (HDD)
WARNING! Disconnect all the connected peripherals, any telephone
or telecommunication lines and power connector (such as external
power supply, battery pack, etc.) before removing the hard disk cover.
IMPORTANT! When replacing or upgrading the hard drive, always
visit an authorized service center or retailer for this Notebook PC.
old hard disk drive