Mobile hard disk as a storage medium, the exchange of high-capacity data between computers, emphasizing the portability of the storage product.

Mobile hard disk is equivalent to a mobile memory, it is connected to the computer to achieve data preservation, easy to carry all kinds of documents, such as from this computer to transfer information to another computer, the space will not be limited to cause put down.

The vast majority of mobile hard disk on the market is based on standard hard disk, and only a small portion of the micro hard disk (1.8-inch hard disk, etc.), but the price factor determines the mainstream mobile hard disk is still based on the standard notebook hard disk.

Currently, mobile hard drives can be categorized into three types by size: 3 .5-inch desktop hard drives; 2.5-inch laptop hard drives; and 1.8-inch miniature hard drives. Speed is an important indicator of the performance of mobile hard disk, mainly depends on the hard disk data transfer rate and speed.

Expanded Information:

Large Capacity

The portable hard disk can provide a considerable amount of The hard disk can provide a large storage capacity, is a more cost-effective mobile storage products. In the case of large-capacity flash drives, the price is still only initially accepted by users, but the mobile hard disk can provide users with a large storage capacity and a good convenience within the price range acceptable to the user.

The market offers 320GB, 500GB, 600G, 640GB, 900GB, 1000GB (1TB), 1.5TB, 2TB, 2.5TB, 3TB, 3.5TB, 4TB and up to 12TB.

Small size

The size of the mobile hard disk (box) is divided into three kinds: 1.8-inch, 2.5-inch and 3.5-inch.2.5-inch mobile hard disk box can be used with a laptop hard disk, 2.5-inch mobile hard disk box is small in size and light in weight, easy to carry, and generally there is no external power supply.

The vast majority of mobile hard drives are USB interfaces, but because of the limited functionality of USB interfaces, the 2.5' hard drive used in mobile hard drives is actually not the same as the hard drive used in laptops.

Laptops require the hard drive to boot up quickly, so laptop hard drives have a higher boot current of about 900mA. The platters used in mobile hard drives take slightly longer to boot, and the starting current is smaller, generally around 700mA. So if you assemble your own mobile hard disk, you still need to find a special mobile hard disk version of the disk core.

High speed

Mobile hard disk mostly use USB, IEEE1394, eSATA interface, can provide high data transfer speed. However, the data transfer speed of the mobile hard disk is still somewhat limited by the interface speed, especially in the USB1.1 interface specification of the product, in the transmission of a larger amount of data, will test the user's patience.

And USB2.0, IEEE1394, and eSATA mobile hard drive interfaces are relatively good. USB2.0 interface transfer rate is 60MB/s, USB3.0 interface transfer rate is 625MB/s?IEEE1394 interface transfer rate is 50~100MB/s.

This is the first time I've seen a USB2.0 interface in my PC.

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