easy method to know WD Hdd families without software

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In order to deal with the hard disk with some professionalism, we must first know the hard disk families and their divisions
We must know that the size of the hard disk for a desktop device is 3.5 inches in manufacturing, and the hard drive of a small laptop is 2.5 inches. Therefore, in some programs for hard maintenance, there is an option for the type of hard drive, either 2.5.
Or 3.5 inches, and of course we take the appropriate option depending on the size of the hard drive.
How do we know the Hard family?
We know the model and family of the hard drive through the code on the outer cover of the hard drive, which we can see on the cover
The external hard drive, the presence of the model, there is a code. After defining the size of the hard drive through the code, you can find out the family of the hard drive through
The two letters following the first two numbers in the code. Note the following image

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