Detection and recognition of taggant substances having predefined zero external field magnetic resonance signatures. A plurality of infrared light-detecting sensors receive said infrared light from said transmitters and provides a signal indicating such reception to a controller. An object-sharing request that intends to share an object in a first object storage to a second object storage is received. Meanwhile, the software application is able to resume writing additional data to the buffer after the data has been copied to the second buffer even if the data has not yet been written to the nonvolatile storage area.