"Most NAND flash chips hold one or two bits of data in each tiny storage cell. SanDisk has begun offering a technology called X3 that can store three bits per cell, while the X4 technology stores four bits per cell."

With all that, e.Digital does not care how they derive density.

Ask them....what ever density they physically come up with....e.Digital adds yet their patented recipe to the mix and will always be ahead of them, for wear, power and utility.

doni