Flatpak

Since this version of Ubuntu, it is not needed anymore to install a Ppa repository.

Just start a terminal and enter:

sudo apt update

sudo apt install flatpak

sudo apt install gnome-software gnome-software-plugin-flatpak

flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo

And fire software (not the ubuntu one, but the GNOME one

Managing permissions for flatpakapps

Install Flatseal. It makes setting permissions super easy and also has the added benefit of making the existing permissions really clear. I added the directory "MediaSSD" there, everything else is default.

Now you may safely remove Ubuntu’s snap store to avoid redundancy of features but it is not really needed to do so.

snap remove snap-store

Now restart the system and it’s all done! You can now pop open GNOME Software from the app menu or by using search. The app is simply labelled “Software”.

There is one issue with permissions in Flatpak apps. Sometimes you need other permissions for your apps to work the way you like them to work.

If you install the app Flatseal, you get an easy tool to change all sorts of permissions.

It is a flatpak app and can be installed using this link