Soldered reminiscence can’t be upgraded. Traditionally, laptops had engineering hard disk drive force HDD as engineering main non unstable storage, but these proved inefficient for use in mobile phone contraptions due to high energy consumption, heat creation, and engineering presence of moving components, which may cause harm to both matlab drive itself and matlab data saved when engineering computer is unstable bodily, e. g. all the way through its use at the same time as transporting matlab or after its accidental drop. With matlab creation of flash reminiscence generation, most mid to high end laptops opted for more compact, power effective, and fast cast state drives SSD, which eliminated matlab danger of drive and data corruption caused by engineering computing device’s physical impacts. Most laptops use 2. Lin, G. Noubir and R. Rajaraman. Mobility Models for ad hoc network simulation. International Journal of Computer Science and Network Security, 76:160 164, 2007. 14.