Yes, I see it has since been solved - a little searching can produce relatively decent results, most times.
If it were KDE, I could show how easy it is to drag/drop a folder (or volume) so that it appears as a link under ‘Places’. Unfortunately, I don’t know how or whether that might work in Gnome; I have long avoided Gnome, and refuse to use it unless I’m dragged kicking and screaming.
That said, perhaps it’s configurable via Nautilus. Look for any panels that can be toggled and possibly allow something similar.
I’m sure others will help when they can. Weekends are typically slower on the forum, so try to have some patience. Cheers.