This is not the first time the President has been criticized for taking a vacation during an urgent situation. During Obama's first term in 2009, Obama addressed the Underwear Bomber situation on television from Hawaii. On the other hand, in 2012 Obama flew back to the mainland midway through his vacation in order to deal with the fiscal cliff negotiations. This year critics cited the recent Sony hack attack as a reason for the president to delay his trip.
SSD (solid-state drive) A solid-state drive (SSD) is a nonvolatile storage device that stores persistent data on solid-state flash memory. Solid-state drives actually aren't hard drives in the traditional sense of the term, as there are no moving parts involved.
Standard Hard Disk Drive. A hard disk drive consists of circular metal disc-shaped platters which store the computer's data. An actuator arm runs between the platters, reading data off the hard drive. These platters constantly spin while the computer is on, almost like a vinyl record player. HDDs are the most common and inexpensive form of hard drive. Solid State Drive. Unlike a hard disk drive, a solid state drive has no moving parts and the data is stored on flash memory chips instead of metallic platters. SSD technology is faster than HDD and less prone to failure since there are no moving parts. Since SSDs are newer technology, they cost more per unit of storage than an HDD.