USB Drive Hard Explanation

By Andreas Lee

usb external hard drive

People in this information era need external media to store their asset. The external media which I’m talking about is USB Drive Hard (USB hard drive). This tool gives large space to store large amount of data and can be easily carried. The size and capacity of USB drive hard have become a requirement for people these days, therefore manufacturer companies compete to create the lightest and smallest USB external hard drive with the biggest capacity.

Besides the capacity and size, some people may not notice even do not understand the performance of USB drive hard. This is another thing which must be considered because the performance can save more time while being used to access or transfer data.

Important Specification of USB Drive Hard

To find a USB external hard drive which has a good performance, there are some specifications that must be observed:

1. Rotational Speed (RPM/rpm)

Rotational speed or RPM (Revolution Per Minute) is rotation speed of disk component on USB drive hard in 1 minute. The faster its RPM, the better data access speed. Rotation speed is available in 4500 rpm, 5400 rpm and 7200 rpm. Choose a USB external hard drive which has the fastest rotation speed, 7200 RPM, because it requires less energy consumption from the computer or laptop.

2. Buffer cache size

Buffer cache is a temporary storage that stores used data. It means that buffer cache gives access speed to used data, so it can help to reduce your waiting time. Buffer cache is available in 8 MB and 16 MB in hard drive market today.

3. Transfer rate

Fast transfer rate does not make you bored while waiting during data back up process. High transfer rate is supported by USB 2.0 interfaced. It is also important for computer users to note because the old version computer / laptop has USB 1.1 port. Most USB drive hard which is sold in the market is currently only compatible with USB 2.0 although some are compatible with both USB 2.0 and USB 1.1.

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