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The question of size: 2.5 ” or 3.5 ”?A key feature in choosing the best external hard drive for your use is the size that suits you best.

 The 2.5 inches (or 2.5 ”) are more compact than the 3.5 ” which is favorable if you have a nomadic use of transported data. The other advantage of the 2.5 ” lies in the power supply: the 3.

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5 ” being larger and often more efficient in reading files, they require a dedicated power supply either in the form of a power cable or a USB cable. This increases the need for a USB port or AC outlet close to the drive and reduces the convenience of the object. For convenience, 3.

5 “hard drives are rather tied to a fixed desktop computer for someone who does not need to move their equipment.Ask yourself the question of mobility and diet before choosing. Whatever happens, when transporting your external hard drive, provide a protective cover because these technologies are usually mechanical, in HDD, which makes them more sensitive to shocks. SSD hard drives exist, offering more solid hard drives, however the price is still dissuasive: at equal price, you have on average 9 times more storage capacity on an HDD than on an SSD.Changing interface: from USB 2.

0 to 3.0The question arises less and less as USB 3.0 has become the standard standard for most external hard drives nowadays, however it may be convenient if your computer does not have a USB 3.0 port of it to propose this interface that he will easily recognize and will be able to use, as in the good old days. So some models still offer the possibility of using both USB 3.0 and USB 2.0. Although the speed is lower but perfect compatibility is priceless.

 In addition, the extreme speed of 3.0 sometimes exceeds the speed of reading and writing the disc if it is not in SSD. For an HDD, the bit rate does not always need to go into new generations of interfaces like the second generation 3.1.

Mac OS or Windows compatibilityIt’s no secret to anyone. Most external hard drives are automatically set for Windows compatibility. Just plug them in for the PC to recognize the driver and use it as storage. For Mac OS compatibility is not always obvious.

 It will sometimes be necessary to format the hard disk in order to evolve its NTFS driver. Some models can make your life easier by accepting both systems simultaneously or by providing disk partitions. If you are working on both types of system operation, choose your best ally in leisure or business. This will save you the inconvenience of inaccessible data when you need it most.

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