In this guide, you will learn how to upgrade RAM, SSD, HDD on Lenovo ThinkPad E455, I will remove the service cover, ram, hard drive and wireless card.
Remove the screws securing the service cover. You can remove the cover.
Under the cover, you can access RAM, hard drive and wireless card.
You can see, the ThinkPad E455 have a spare ram slot, but no mSATA slot.
RAM: come with one 4GB ram, you can add another 4GB to the spare ram slot.
RAM Type: DDR3 1600MHz.
SSD: you can add a 2.5″ SSD (replace the original hard drive).
Second HDD: no support.