Nodes of an ad-hoc network may determine a category assigned to neighbor nodes and may select a communication pattern for communicating with the neighbor nodes based on their assigned categories. This is accomplished by creating a \u2018T\u2019 shaped device that can be ergonomically designed for the back. The block size of the flash memory device may be changed from the first block size to the second block size by shifting at least one bit of the block address to the page address or shifting at least one bit of the page address to the block address.