Yes, today we proceed to the chapter of secondary storage! Please don't be confusing, because primary storage is different with secondary storage.
For a quick understanding, the significant difference here is in term of storage. Secondary storage can store information permanently and it is non-volatile. In contrast, primary storage only available can keep information temporary and it is volatile. Example is RAM.
Basically, our daily life always connected with secondary storage. Examples like DVDs, CDs, blue-ray disc, internal hard disk, external hard disk and so on.
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