I am just asking for a confirmation here since I'm not really sure how it works
So, I have Debian Stretch on my home machine, I was the sole user so I had a normal user account and used su - when I had to use administrative commands. I also use the root password to mount my other partitions in the GUI, such as the partition where my music is stored.
My cousin moved in with me and since he wants to learn how to use linux, I created an account for him and added him to the sudo group, to allow him to mount the media partition as well (we kinda like the same kind of music), but since then, when I want to mount the partition from my account, it looks like I have to use his password now, not the root password anymore.
So, I wanted to ask if this is a normal behavior (in which case, I just have to add my account to the sudo group as well) or if there was something I was doing wrong.
Thank you in advance.
In case you want to ask, I like the behavior of not mounting my other partitions by default. And I also like to not have my own account completely separated from administrative tasks as using sudo commands kinda tricks me sometimes.
Edit It looks like my question needs clarification
I can use su - in the terminal when I want to switch to root for my admin commands, but I was used to mount my other partitions using thunar who used to ask me for the root password, but now, when I want to mount my partitions, still using thunar, now, it prompts me my cousin's password instead of the root password.