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(i). Used to store backup data & instructions that is not needed immediately (or not currently in use) by the CPU. This helps in creating space for another data to be stored in the memory.
(ii). Used for transportation & distribution of data & software, i.e., for transferring files from one machine to another.
(iii). Used to back up files (keep copies of data & programs) for safe-keeping.
Whatever is in memory is lost (or can be corrupted) when the computer or the power supply is switched off. Disks can therefore be used to store programs & data, which can be retrieved when needed.
(iv). Used to install new software.
Kavungya answered the question on April 2, 2019 at 08:15
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