An integrated storage system for vehicles includes an expandable container secured to and extendable from a vertical panel of the vehicle to at least one predetermined position to accommodate cargo. The container is collapsible so that it is substantially flush with the vertical panel when not in use and may be made of fabric or netting, for example. A semi-rigid end panel with a handle may be secured to the container to facilitate deploying and stowing the container. Depending on the application, the container may be removable from the vehicle to transport cargo. The storage system may be integrated into various locations including a cargo area, behind a seat or seats, in a truck bed, or in the trunk of a vehicle, for example.