A solid state disk device comprises a plurality of nonvolatile memories and a controller. The
plurality of nonvolatile memories are electrically connected to a plurality of channels,
respectively. The controller controls storing, erasing and reading operations of the
nonvolatile memories. The controller divides input data into a number of units corresponding
to a number of the plurality of channels and stores the divided input data in the nonvolatile
memories through the plurality of channels.