Which of the following memory or storage devices are considered as offline storage?

1.Hard disk drive (HDD)

2.Blu-ray disk

3.DVD or CD

4.USB memory stick

A1, 2 & 3 only

B1, 3 & 4 only

C1, 2, 3 & 4 ✓ Correct

D2, 3 & 4 only

Correct answer: (C) 1, 2, 3 & 4

Explanation

A hard disk drive, Blu-ray disk, DVD or CD and a USB memory stick are all counted as offline storage.

Each of these holds data on a device separate from the computer's main working memory.

A hard disk drive stores data magnetically and keeps it after the power is off.

Blu-ray, DVD and CD are optical media read and written with a laser.

A USB memory stick uses flash memory and can be carried and plugged in as needed.

Offline storage keeps data safe without being loaded into main memory until it is opened.

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