So how would this work?
It would use the information Adobe Spark already has
1. What brand a post is set to
2. What size a post is set to

So what would this do?
For example, if you had a post that was set to Brand 1 and was a Facebook post. You would go to Brand 1 > Facebook in your folders, and it would be in that folder.

The second example, if you had a post set to Brand 2, but it was an Instagram Story (instead of a standard Instagram post or Instagram Landscape/Portrait), you would go to Brand 2 > Instagram > Instagram Stories and it would be in that folder.

I would find this super useful in finding the posts I need and would save a countless amount of time.