How to transfer almost all data from one hard drive to another on macbook?

Question

macOS

The fact is that I have a 2010 macbook on macOS X El Capitan version 10.11.5. I would like to move most of my data from one hard drive (Macintosh HD) to a second one (DataDisk), both installed in my macbook. On the first I have only 10 GB free, and on the second 221 GB. I tried different ways to free memory, but it didn't work. I would like all at once, or at least most of it.
I hope for your help and will also answer your questions with clarifications.

Answer 1

I recommend using Carbon Copy Cloner