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If you are movie or song lover who would be storing lot of movies then go for higher capacity of 240 GB depending on your budget.
Let us select proper speed. The most common speeds which are available in market are 5400 and 7200 RPM. The 5400 RPM means hard disk will be rotating at a speed of 5400 revolutions per minute.
Now there is not much price difference between 5400 and 7200 rpm. It is better to go for 7200 RPM hard drive.
It is better to go for standard brand. Seagate, Maxtor, Western Digital, Samsung & Hitachi are standard brands available in market.
The above suggestions are for your internal hard drives. If you have to carry data frequently, you can go for external hard drive. These drives can be connected to computer through USB port. There is absolutely no difference between external hard drive and internal hard drive if you consider operation or drive mechanics. USB interface has made external hard drive installation very user friendly.
External hard drives give lot of portability. However these external hard drives have higher access time compared to desktop drive because of USB interface. But because of USB interface, CPU utilization is less in range of 8.4 to 10. This means less load on CPU.
Iomega, Freecom, Transcend are some of manufacturers of external hard drives. These drives require external power supply and are most suitable for desktop use. When you are selecting external hard drive, check whether manufacturer is offering a carry bag, data cable and power supply if it is externally powered.
Also check warranty offered by manufacturer. Now a days, some of manufacturers offer warranty for 3 years.
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