Prices, three 3.5-inch external hard disk 1TB original price is not expensive, are less than 800, the new Western Digital My Book Essential 1TB Hard Drive is currently selling 799 is the most expensive in three, with a have a certain decline in space. Essential craftsmanship and unique design, but quite good, books look even more like the ultra-thin, but also in the hard disk box around the cooling holes are also designed to ensure the stability of the work of the internal hard drive. Core-wing series of external hard drives Seagate FreeAgent Desk with the current cost-effective external hard disk.

Warranty, the new Western Digital My Book Essential 1TB Hard Drive and Seagate Core-wing series of external hard drives respectively three and two-year warranty, Seagate FreeAgent Desk Hard Drive provides up to 5-year warranty service, users can enjoy the that there is quality assured service. Today, the original movement and assembly of external hard disk drive products, the price gap has been very small, and in the speed and stability as well as after-sales has become more assured, the user can choose according to their preferences which three original 3.5-inch external hard disk.

1. Portability

External hard disk have large capacity, high-speed transmission, 3.5-inch external hard disk drives used the core desktop parts, need to use an external power to supply power, this made its portability greatly reduced.

Flash memory cards is a major accessories to expand the capability of digital products, small size made it’s easy insert into digital products, the highest portable of flash memory card is TF card and M2 card, the size of the two memory card only about 15.0mmx11 .0 mmx1.0mm, 1.14gg weight is also almost negligible.

U disc will have higher capacity smaller size as technology advances and will be more and more mature, a lot of U disk is almost the same size with flash memory card, and still increasing the capacity.

2. Exterior design

External hard disk drives using the computer hard disk as the main core parts, this led to its exterior design has not changed much, it has been boxy, which directly caused there are not too stunning exterior design now.

As the use of compact flash memory chips, U disk design has more changes, and it’s actually very simple, as a result of not only used in storage data, but also be used as a fashion accessories and gifts.

3.The scalability of data storage

As the volume limitations, unlike the storage cards, external hard disk can not be turned into expansion accessories of a variety of digital products,.

The flash memory card is completely different, the most common digital camera, PSP and other digital products using flash memory cards  to expand the capacity, and it can easily store data to meet the  requirement by using the reader.

4. Transmission speed

Most mobile storage products using USB interface to transmit, transmission data be limited. With the growing popularity of flash memory chips, solid-state hard drives using flash memory chips as a solid-state memory chips are also been produced, and solid-state hard drive is SSD, which constituted by the flash memory chips, as mechanical hard drive, the most obvious advantage of SDD is speed, such as a 15,000-rpm hard drives need  200 milliseconds to switch a lap, while the data is stored in Flash as particles on the SSD, it can complete I / O (input / output) operation in less than a millisecond for any location of the memory cell, so SSD drives can reach 50 ~ 1000-fold. And the advantage of SSD solid-state drive in the weight is completely overwhelmed laptop hard drives, and more suitable installed on notebook computers, satellite positioning system such as push-based mobile products, a smaller weight increased more portable.

5. Safety

If the hard drive is impacted by an external forces, it will be very  prone to failure, the most common examples are the external hard drive  accidentally fell to the ground. Hard drives will issue the noise when operating, and issued a a lot of heat and affect the stability of the transmission data, which the data will be very vulnerable.

Secondly, seismic performance, SSD using flash memory chips, even in the fast-moving or hit by a hard object will not affect normal use, even the most common accidents appeared such as falling or collision with hard objects, it can also guarantee the security of data, and not need to worry about effects such as heat and noise. But external  hard disk unlike some U disk and memory card have waterproof, dustproof, shock and other effects.

Summary: From the above grounds, security, portability, transmission speed, flash-based storage product is superior to external hard disk, the next major trends in mobile storage is external hard drives available with low prices and high-volume capacity