How to leave the second partion (backup partition) untouched?

Hallo

Before you do anything else BACKUP YOUR DATA!

It sounds as if your new to or not very experienced with partitioning storage media. Be warned - if you get it wrong you can loose data. So first of all - backup your precious files.

You might find this resource useful:

Question 1
Do you want to erase the W10 partition?

Question 2
Do you want to erase the recovery partition?

Question 3
Do you have an external drive available to backup your existing files onto?

Question 4
Are ALL your files (photos, documents, etc.) in formats that the software you intend to use on Ubuntu-Mate can open and work with?

Your answers to these questions will help other members of the forum to give you more specific advice.

I've done the transition on three machines, just take your time and plan things out. Make sure you understand what you're doing before you begin. The reward is Ubuntu-Mate. :grinning: