Hello,
how to save a file collection?
they are automatically saved once you assign a name to the collection.
Thanks
one more question: how to delete a collection folder without all files inside it?
Actual collections can simply be deleted, via File Collections.
On the other hand, if you mean a real folder that's inside a collection, you can remove it from the collection the same as you'd remove a file: Select it, then open the menu that's attached to the Delete button, and choose Remove from Collection.
That's nice. Thanks.