removable hard disk interfaces


The three most popular kinds of removable hard disk interfaces are USB, Firewire, and eSATA. An interface is merely computer lingo for connection type. With the introduction of USB, the most frequent standard, external hard disks have become widely available and relatively cheap. Desktop models usually need a power supply whereas most of the mobile models get their power from the USB port.

removable hard disk interfaces

Presently, USB 2.0 speed is all about 480 megabits per second. But, USB transfer rates are greatly affected by other devices and software that are running at the same time as your file transport, decreasing functionality.

USB 3.0 goods are predicted to arrive in 2009 or 2010. USB 3.0 is expected to be 10 times faster than USB 2.0, up to 4.8 gigabits per minute.


Conversely, Firewire is more like a direct link to the external disc , and will copy files much faster than USB. Firewire is Apple Inc.’s name for the IEEE 1394 High Speed Serial Bus. It’s favored over the more common USB because of its greater effective rate and power distribution capabilities, and because it does not require a computer server. The present Firewire 800 (almost 800 Megabits/sec transfer speeds ) is shortly to be replaced by S1600 and S3200 – that enable data transmission speeds up to 1.6 Gigabits/sec and 3.2 Gigabits/sec respectively.


ESATA which stands for”outside” Serial Advanced Technology Attachment, speak over a high-speed serial cable. This is a relatively new solution for external drives because USB 2.0 and Firewire connected drives have been around for some time now. The main benefit of this eSATA technology is speed, some 4-6 times quicker than existing USB 2.0 and Firewire transfer rates. You will soon be seeing more and more products that provide eSATA as an option. the best external hard drive will soon be capable of three ports – but some are only capable of either USB or Firewire. Something to keep in mind when you are picking an external hard drive.

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