Computer

Simple to install and more affordable, an external hard drive is an interesting solution to extend the storage space of a computer. Whether portable or intended to stay on a desk, network accessible or not, able or not to read multimedia files. Everyone to choose according to his needs.

Photos, videos, music files, games, software digital data accumulates so quickly that it sometimes feels cramped in the hard disk of a computer. An external hard disk makes it possible to extend, simply and at controlled cost, its storage space. Just connect the device to the computer to burn data. The use of the Portable hard drive is there now.

Fixed or Portable

A desktop hard drive is quite bulky and its weight can exceed the kilogram. These memory units are not really nomadic products, even if they remain portable. Their storage capacity ranges from 750 GB to 6 terabytes (TB) for prices ranging from 130 to more than 350 $. Not to be confused with the “buffer” memory (or “cache” memory), of 8, 16 or 32 MB, which serves only to optimize the performances (and does not constitute a criterion of selection).

  • The size of the platters that compose them serves as a generic name: we are talking about hard drives 2.5 inches and 3.5 inches. The speed of rotation of 3.5-inch hard drives today reaches 7,200 rpm (rotations per minute), which ensures a good rate of writing and reading data. This performance, however, requires manufacturers to integrate a power supply, which forces to have a power outlet nearby.
  • Lighter (around 200 g), and therefore more suitable for transport, portable external hard drives have them, trays of 2.5 inches. They offer more limited capacity, from 500 GB to 2 TB, for prices ranging from 50 to 200 $. Their turntables are currently running at a speed of 5,400 rpm, de facto offering a slightly lower bitrate than “fixed” drives, but this makes it possible to avoid mains connection during use: the connection to the computer, via a USB port or other, enough.

There are also Wi-Fi portable hard drives, to extend the storage space of a smartphone or tablet . The Wi-Fi makes it possible to connect the hard disk to the smartphone or the tablet, after which the user can copy his files in both directions, from an application downloaded from the App Store (Apple) or Google Play online stores. Store (Android). However, file transfer is not as fast as with a wired connection. Note that you can also start playing files (music for example) on your smartphone, Wi-Fi, without having to copy them. Refurbished Dell PowerEdge Servers

A Case to Save Money

An alternative solution is to buy an internal hard drive and slip it into a box, bought in parallel. There are two formats (2.5 and 3.5 inches). The performance is similar, but the cost per use can be more interesting, especially for users who, handling large volumes of data, juggling between multiple hard drives. It takes between 20 and 50 $ for a box and 100 $ for a hard disk internal 3.5 inches of 2 TB. An equivalent external hard disk is sold around 150 $.
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