Thanks for your help! I have to try this at home later today.
Do I have to do this if my network shares are already mounted on the file manager? For example I use Nemo and my NAS is shown on the left side and I felt like my files were already mounted on the system (there's a "eject icon next to the name of the share).
Thank you for your feedback, I'll have to check on the machine later today. So far, I thought that the share had to be mounted once (on Nemo file manager for instance) so I could find it on the applications. If so, I did it already and it's not showing anywhere else on the software I mentioned.
By the way if you have a suggestion of an application that works for you on this kind of setup I'd be glad to try.