How to determine which folders and files are taking space in my Zoho docs account ?

How to determine which folders and files are taking space in my Zoho docs account ?

Hi , 

I get an error saying that I have exceeded the 5GB limit in my Zoho Docs account , so despite going ahead and deleting files - it still shows the same . How do I determine which folders are taking space as I don't see anywhere where the sizes are being displayed. 

Thanks, 
Sobin