The invention is a shoulder strap carrying device, system, and method. The carrying device has swappable containers that connect to the straps via fasteners under the arms of the wearer. The containers enable the user to organize and easily access the personal items being carried. More particularly, the invention is a “Figure 8” shoulder strap that loops around a wearer's arms and has fasteners substantially beneath a wearer's underarms to hold multiple swappable containers, cases, and utility devices for storing various personal items.