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There's no question that external hard disks have become an essential part of our lives. With the ever-growing amount of data we create and consume daily, it's become increasingly important to have a reliable way to store and back up all of our important files.

Nowadays, almost every computer user has an external hard disk. This is because they are very convenient and offer much storage space. Many different brands and types of external hard disks are available in the market. 

In this guide, let's consider the different features when buying an external hard disk. We'll also recommend a few of the best external hard disks currently available.

 What is an External Hard Disk?

An external hard disk is a portable storage device that connects to a computer via an external interface, such as a USB or Thunderbolt. External hard disks are available in various sizes, from small to large.

Types of External Hard Disks

There are two main types of external hard disks:

1. Portable external hard disks: These are small and light, making them easy to carry around. They're typically powered by a USB connection and don't require an external power adapter.

2. Desktop external hard disks: These are larger and require an external power adapter. They offer more storage space than portable external hard disks and are typically used for backing up or storing large amounts of data.

15 Features of an External Hard Disk:

1. Capacity: One of the most important factors to consider when choosing an external hard disk is the amount of storage space it offers. External hard disks are available in various storage capacities, from a few hundred gigabytes to several terabytes.

2. Read/Write Heads: The read/write heads are the part of the disk drive that reads and writes data to the disk platters. More heads generally mean faster data transfer speeds.

3. Interface: The interface connects the external hard disk and your computer. The most common interfaces are USB, Firewire, and Thunderbolt.

4. Operating System: Another essential factor to consider is what operating system the external hard disk is compatible with. Most external hard disks will work with both Windows and Mac, but some are only compatible with one or the other. 

5. Password Protection: Some external hard disks come with password protection, which can be a valuable security feature. This means that if your hard disk is lost or stolen, the data on it will be inaccessible without the correct password.

6. Data Recovery Services: Another essential security feature to look for is data recovery services. This means that if your hard disk fails, the manufacturer will recover the data on it. This can be a valuable service, particularly if you have essential or irreplaceable files on your hard disk.

7. Disk Drive HDD: The disk drive HDD is the component of the external hard disk that stores the data. The capacity of the HDD is one of the main factors determining the device's overall storage capacity.

8. Cache Memory: Cache memory is high-speed memory used to store frequently accessed data. Having a large cache memory can improve the performance of the external hard disk.

9. Data Transfer Speed: The data transfer speed is the speed at which data can be transferred to and from the external hard disk. This is important to consider if you need to transfer large files or are working with video or audio files.

10. Form Factor: The form factor is the physical size of the external hard disk. External hard disks are available in various form factors, from large desktop models to smaller portable models.

11. Power Supply: The power supply is the component of the external hard disk that provides power to the device. Most external hard disks are powered via a USB connection, but some models may require an additional power adapter.

12. Cooling: Most external hard disks, such as a fan, come with active cooling. This is important to consider if you plan to use the hard disk for intensive tasks, such as video editing.

Factors to consider when buying an External Hard Disk:

There are many factors to consider when buying an external hard disk. Some of them are as follows:

1. Compatibility: Ensure that the external hard disk you're considering is compatible with the devices you want to use. Most external hard disks will work with both PCs and Macs, but some are only compatible with one or the other.

2. Connection Speeds: The connection speed is the speed at which data can be transferred between the external hard disk and your computer. The most common connection speeds are USB 2.0, USB 3.0, and Thunderbolt.

3. Durability: External hard disks can be dropped, bumped, and otherwise mishandled, so it's essential to choose durable. Look for an external hard disk with a warranty if it is damaged.

4. Size: External hard disks come in a variety of sizes. If you plan on storing many large files, such as video or audio files, you'll need a larger external hard disk. Choose the size that best fits your needs.

5. Warranty: Warranty is an essential factor to consider when choosing any piece of electronic equipment. Many external hard disks come with a limited warranty, which will cover you in the event of a hardware failure.

6. Price: The price of an external hard disk varies depending on the storage capacity, speed, and features. Compare prices to find the best deal.

Brands to Choose From:

Seagate: Best known for its backup software, Seagate also makes some of the best external hard disks on the market. Their external hard disks are available in various sizes, connection speeds, and price points.

Western Digital: Western Digital is another well-known brand that offers external hard disks. They have various models, including high storage capacities and fast connection speeds.

Some Popular Models to buy:

Seagate One Touch 2TB External HDD: The Seagate One Touch 2TB external hard disk is an excellent choice for those who need a lot of storage space. It has a USB 3.0 connection and a sleek, compact design.

Seagate One Touch 4TB External HDD: This external hard disk from Seagate has a storage capacity of 4TB, making it great for storing large files. It has a USB 3.0 connection, offers fast data transfer speeds, and comes with a one-year warranty.

Conclusion:

When choosing an external hard disk, there are many factors to consider. Compatibility, connection speeds, durability, size, and price are all crucial factors to keep in mind. There are many reputable brands, such as Seagate One Touch and Western Digital.