External download link limit

External download link limit

Can You please help us to understand this 
  1. For Zoho WorkDrive external users, the download limit is a maximum of 5 GB total download size and a maximum of 50 first-level files and folders
What is the meaning of first level?

We are using these files in external page , we saw after some page view the customer is not able to see the project images .
Can You please guide how to allow our external users non logged to view files