Secondary storage, Data storage used to store data so that the computer can be switched off., Optical disc, CD, DVD or Blu-ray disc that is read/written to with lasers., Magnetic storage, Hard disk drives and magnetic tapes that hold data as magnetised patterns., Solid state drive (SSD), Alternative to a traditional magnetic hard disk drive that uses flash memory., Durability, The strength of the device to last without breaking., Reliability, The likelihood of the device continuing to perform well over time., Portability, How easy it is to carry the device around., Capacity, The maximum amount of data that can be stored on the device., Access speed, How quickly data on the device can be read or edited.

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