To view your existing folders, add new ones, or remove any as necessary, follow the steps below.
Add a new folder
From the left-hand menu, click Campaigns.
Click Asset Library:
To add a new folder, click New Folder.
To add a subfolder, select the parent folder first, then click Manage Folder.
Select the brand, then type in a name for the new folder.
Click Create Folder.
Manage your folders
From the Manage Folder list, by the relevant folder click, click the three-dot 
icon and select either:
Add.
Rename
Delete.