Bluetooth File Transfer is not just for copying files between two devices, you can also use it to edit, create, delete, move and rename files, either on your device, or another Bluetooth-enabled device, such as a PC, smartphone, PDA, or a music player.
Meaning and definition of bottleneck effect : Genetic drift resulting from the reduction of a population, typically by a natural disaster, such that the surviving population is no longer genetically representative of the original population.
The term bottleneck is often used in conjunction with a manufacturing facility and refers to a point in the production process where product bunches up, then slows down or stops completely. For example, if two conveyor belts merge into one, the point where they merge is the bottleneck.