A hanging storage system comprising a resealable evacuable bag and a hanging device attached to the bag. The hanging device is designed to attach to a portion of the bag in a manner such that a vacuum inside the evacuated bag can be maintained while the bag is hanging, e.g., in a closet. More specifically, the hanging device comprises first and second parts that couple together, the first part being disposed inside the bag and the second part being disposed outside the bag, with a portion of a thin flexible bag wall being disposed between the coupled first and second parts.