Can I upgrade MacBook Pro mid-2012 with PCIe gen 4 using a SATA adapter?

My MacBook Pro's performance has gone down and sometimes files are unreadable and sometimes MacBook is unable to boot up, so I am thinking to upgrade my MacBook with a PCIe gen4 SSD and use an adapter such as this StarTech model.

This is what I am thinking to go for!

to fit it inside SATA slot, is this recommended or will it even fit and work?

my MacBook model

System Report

Solution 1:

I'd guess you could but why would you want to?
The bus is limited to SATA III speeds, so why not just fit a much cheaper standard 2.5" SATA III SSD instead? You could get a 1TB cheaper than that 500GB.