The days of hard disk drives are gone. Solid-state drives are the trend now. Hard disk drives use that spinning technique and used to be slower. The present day drives with solid state devices (transistors) are the popular ones these days. Lot of innovations have been happening around these solid state drives these days. All these innovations run around power consumption, speed and storage capacity (density). Considering the fact that all our laptops run on batteries and in which SSD are popular, power consumption is a primary factor.
To understand NAND memory in detail, a NAND flash ship consists of memory and associated controller. There are players like TOSHIBA, SAMSUNG, MICRON, HYNIX, SANDISK and others. Basically, NAND flash is used to store OS and other user data. This is the memory source for any system.
V-NAND:
V stands for vertical where the cells are placed vertically. V-NAND uses charge flash trap technology. This ensures larger aerial densities. This v-NAND uses silicon nitride for charge storage and not polycrystalline silicon. The power consumption of of V-NAND will be 50% of conventional NAND structures. Also, the read/writes are much faster. This V-NAND uses 10nm technology for construction. The reliability of V-NAND is also high.
3D V-NAND:
This technology is developed by SAMSUNG which increases storage capacity. this technology basically increases the number of layers with the existing space itself enabling increasing densities. This is a kind of layer stacking. Moving ahead to the higher densities this is very useful. 3D V-NAND is a result of intensive research from SAMSUNG. Take a look at the 850 PRO, 850 EVO from Samsung for latest models.
