The Student Room Group

1.3 storage devices OCR computing help

On the ocr spec it's says :h:ow different input, output and storage devices can
be applied to the solution of different problems.
(b) The uses of magnetic, flash and optical storage
I don't know how many examples in supposed to know for each one as all the resources I check have different amounts and types of each.Can anyone tell me what I'm supposed to know for this?

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