The default Wuala interface has two columns with two primary panes.
The icons represent:
The first column from the left lists your directory of Wuala accounts and groups:
The second column from the left gives you a larger perspective of your folders and files.
Folders are colored by access rights:
A folder can have an icon that indicates it is being used for:
The icons represent:
The Status Pane storage capacity will differ according to the storage being accessed by the user: