2 - 4 horas
Putting an SSD in any machine is a must IMO. so I needed to add SSD to my new MacMini
I got the tools from iFixIt, and followed the online manual.
Tools are amazing and great quality.
Manual is simple, great pictures and easy to follow. It appears that 1 or 2 screws locations in my latest MacMini is a bit different than the manual, but that wasn't an issue at all.
I've done the operation without any issues and no hiccups
you won't be able to install the second HD/SSD if you didn't buy iFixIt tools, get it before proceeding.