Just click on the empty heart icon in the file browser or right-click
on the file / folder and add to favourites.
The heart will go solid
to show it’s been added.
To view your favourites, click the heart icon, top right on the UI, and
it will turn blue.
The favourites list is fully searchable and you can use the tags to filter,
so it’s a great way to view a more relevant library of sounds.
You can even use ADDITIONAL Tags to give you a more customisable way of favouriting your sounds. You may want to source a collection of sounds for a particular track you are making. See the Tag editing article for more info.