Backpack systems and related methods are provided herein. A backpack can include a front wall, first and second side walls, a bottom extending between bottom portions of the front wall and the first and second side walls and a top panel extending between top portions of the front wall and the first and second side walls. The top panel can include a fastener for securing the top panel to the front wall and portions of the first and second side walls such that the top panel is openable and closeable. A rear panel is provided opposite the front wall and extending between first and second side walls, the bottom, and the top panel.

A portable storage device having a main storage compartment and an expandable storage compartment. The main storage compartment may have a front wall, a rear wall, a first side wall, a second side wall, and a bottom wall, with each of said walls being of a cloth like material. The main storage compartment may have a removably coupled top coupled to the main storage compartment through a fastener. The expandable storage compartment may have a front folding section, a first side folding section, a second side folding section, and a bottom folding section.

Embodiments of the present invention relate to a reconfigurable bag which can form a variety of bags, handbags and purses. With all of the demands of busy lives, women today need to have a variety of bags and purses. Women need a clutch for evening use, a large purse for taking to work, a smaller purse for daytime outings, and a briefcase or computer bag. A reconfigurable bag as disclosed herein would help to eliminate these issues by providing a bag that can be converted to a variety of bags and purses.

A modular bag has: at least two opposite walls forming at least one compartment; a plurality of vertically extending channels on opposite internal sides of the walls, the channels formed by vertically extending, spaced seams, which are on one of the opposite internal sides aligned with the vertically extending seams on the other internal side; and at least one divider element comprising a divider portion dividing the compartment into sub-compartments and two flap portions inserted into the channels of the opposite internal sides of the at least one compartment. The divider portion has a vertically extending first end oriented towards an internal side of one of the walls and a vertically extending second end oriented towards the other internal side of the walls in an inserted position. The two flap portions extend substantially perpendicularly from the first and second ends of the divider portion in the inserted position.