Lenovo ThinkPad T540p - disassemble for HDD and RAM upgrade or battery replacement

Lenovo ThinkPad T540p - disassemble for HDD and RAM upgrade or battery replacement
Simple instructions for how to disassemble Lenovo ThinkPad T540p laptop to upgrade HDD, RAM memory or to replace battery.
With 8 or 16 GB of RAM memory, SSD disk and win10, it can still serve good for a less demanding user and simple tasks.
Laptop specs:
*i5-4gen
*8 GB DDR3L (2 slots)
*M.2
Music in the background:
Cyberpunk by AHOAMI
tunetank.com/track/6218-cyber...