An external hard disk is just a hard disk drive (HDD) or solid-state drive (SSD) that needs to be connected to the computer rather than being inside the computer. External hard disks are sometimes referred to as portable hard drives or mobile hard drives.
The vast majority of mobile hard drives in the market are based on standard hard drives, and there is a small number of micro-hard drives (1.8-inch hard drives, etc.), but price factors determine that the mainstream mobile hard drives are based on standard hard drives.
One way to think about an external hard drive is as if it were a normal internal hard drive that has been removed, overlaid in its own protective sleeve and plugged into the computer from outside.
External hard drives have different storage capacities, but they can be connected to the computer via USB, FireWire, or wirelessly.
- Large capacity with small size
Mobile hard drives can provide considerable storage capacity. They are a more cost-effective mobile storage product. In the case that the large-capacity “flash drive” price is only initially accepted by the user; the mobile hard drive can provide the user with a larger storage capacity and a good convenience within a price range acceptable to the user.
- High data transmission speed
Portable hard drives mostly use USB, IEEE1394, eSATA interfaces, which can provide high data transmission speed. However, the data transmission speed of the portable hard drives is limited to the interface speed to a certain extent.
When the external hard disk exchanges data with the computer, it takes only a few minutes to read a large file of GB level, which makes it especially suitable for the storage and exchange of video and audio data.
- Easy to use
The external hard disk with USB interface is the mainstream at present. The mainstream PCs are basically equipped with USB functions. The motherboard usually provides 2 to 8 USB ports. Some monitors also provide USB adapters. The USB interface has become a must-have interface in personal computers.
- Reliability improvement
Data security has always been a major concern for mobile storage users, and an important criterion for measuring the performance of such products. External hard disks have won the favor of many users not only with the advantages of high speed, large capacity, lightweight and convenience, but also the security and reliability.
- External hard drive is portable and operates on a plug and play basis. We can use it as a storage device for any computer with a USB or FireWire capability.
- You can use an external hard as an emergency backup drive. Sometimes hard drives crash, so having a backup is essential if you depend on your computer for work or personal needs.
- If you use the external drive as your main drive, you can speed up the performance of Macs with slower internal drives.