Log in to the Sponsor workspace -> Select your Event and then select the Booth -> Choose Resources from the left Navigation Menu.
Once you select resources then you will see the already added resources and it would also give you an option to add resources from the top right as shown above.
In order to add a resource simply click Add Resources -> Providing a Title for the Document -> select Upload -> hit SAVE.
The system would then refresh the page and then we will be able to see the new document added.
Additionally, we can also add a document by adding its URL and then clicking SAVE to make sure the document gets added successfully.