Abstract: A personal storage device may have at least two interchangeable storage modules, such as a wallet, cell phone carrier, bag, water bottle holder, or the like, removably attached to the ends of a pair of shoulder straps draping over a user's shoulders. The two shoulder straps may be joined by one or more back straps, to which a storage module may also be attached, and an upper chest strap or decorative jewelry chain. A user may quickly and easily exchange a storage module with one of a different configuration in accordance with the user's preference. One or more auxiliary storage features may be attached to or incorporated into the shoulder straps. Personal items carried in the storage modules and/or the auxiliary storage features are readily accessible and their weight is distributed across the user's shoulders. The device may be lighter and less bulky than conventional wallets, pockets, or handbags.