Solid State NAND based flash drives surfaced in 1991 when Sandisk introduced a 20MB product for $1000. Since that early drive, prices have fallen considerably.
NAND based SSD products have come in a rage of form factors however the focus of this study will be with SATA drives. Eventually we may add second section for M.2 drives given the move to motherboard mounted devices where additional bandwidth is available.. SATA products are widely used with notebook and netbook class machines. Smaller form factor machines tend to use SDIO interfaced and are soldered to the logic board.
SSD reliability has slowly improved. Competition has driven innovation for decades and we expect SSD to hold a niche position in the market.