Upgrading Ram on Acer Aspire E5-571 i5 | how to buy ram according to laptop | 4gb to 8gb ram

Upgrading Ram on Acer Aspire E5-571 i5 . i have acer laptop with 4gb ram.
i bought same ram which i have one 4gb ram of Samsung ddr3 pl3l from amazon. I experience that don't try any another ram for your laptop buy same ram which you have first. i will give ram link of my model laptop.

Samsung ddr3 plc3 ram link

[charactersonly]

I have the E5-571P without the optical drive. Can i remove the black plastic enclosure and replace it with a caddy that has HDD or SSD for additional storage? If i can can u provide me with a link from amazon or ebay of which caddy i need to purchase. Tk u sir.

[bodabhai]

Bhai aapki bideo dekh k gaamnd fat gyi he vro abhi is gamd ko exchange kaise kre uspe bhi bideo banaiye na bhai