Samsung P55 - Manual (Page 127)

16
3
Push the memory module down so that it is
completely fixed. If the memory does not fit easily,
push the memory module down while pulling the
memory module latches outward.
4
Close the memory compartment cover and fasten
the screw.
Removing a memory module
Pull the memory module latches outward. The memory
module will pop up.
Remove the memory module out at an angle of 0
degrees.