Start with the contents
List the furniture, boxes, tools or other stored items you want removed. Photograph the inside from more than one angle if the front row hides the rest. Set aside anything you are keeping or identify it clearly during the walkthrough. If the pickup also includes items outside the shed, describe those separately. The goal is a complete contents list rather than a request to clear a shed that leaves the amount and type of items unclear.
Find Junk Removal