External HDDs
External HDDs are ideal for large files such as backups or media archives.
External Hard Disk Drives
External HDDs are a practical and cost-effective solution for large amounts of data. Thanks to their comparatively low cost per terabyte, they are particularly suitable as backup drives, for photo and video collections, or for the long-term storage of large files. Here you can find external HDDs in various storage capacities as well as in compact 2.5-inch and desktop 3.5-inch formats.
2.5-Inch or 3.5-Inch HDDs: Which Size Is Right for You?
External HDDs are available in both 2.5-inch and 3.5-inch formats.
| Feature | 2.5-Inch HDD | 3.5-Inch HDD |
|---|---|---|
| Design | Compact | Larger |
| Use | Portable | Desktop |
| Power Supply | Often via USB | Usually via a separate power adapter |
| Capacities | Generally lower | Very high capacities |
| Suitable For | Portable use and simple backups | Large backups and data archives |
What Should You Consider When Buying an External HDD?
In addition to the physical size, storage capacity is particularly important. Depending on the amount of data, 1 or 2 TB is often sufficient for smaller backups, while large photo, video, and file collections may require more storage. You should also check the HDD's connection type: depending on the model, USB-A or USB-C may be available. A compact 2.5-inch HDD is generally a good choice for portable use, while a 3.5-inch HDD is well suited to large stationary data archives.
External SSDs often offer faster transfer speeds and are lighter. If you want to use your external drive as additional storage for games, an SSD is usually the better choice.
FAQ – External HDDs
Which External HDD Is Suitable for Backups?
For regular backups, choose an external HDD with sufficient capacity for your current data and future backups. Compact 2.5-inch HDDs are practical for portable backups, while 3.5-inch models often provide more storage space for larger data archives.
What Is the Difference Between 2.5-Inch and 3.5-Inch HDDs?
2.5-inch HDDs are more compact, lighter, and are often powered directly via USB. 3.5-inch HDDs are larger, usually require a separate power adapter, and are particularly suitable for high storage capacities and stationary backups.
How Much Storage Should an External HDD Have?
The right storage capacity depends on your intended use. For documents and smaller backups, 1 to 2 TB is often sufficient, while large photo, video, or data collections can benefit from 4 TB, 8 TB, or more.
How Long Does an External HDD Last?
The lifespan of an external HDD depends on factors such as usage, operating conditions, and how the drive is handled. Since HDDs contain mechanical components, they are more sensitive to shocks and vibrations than SSDs. For important data, you should therefore not rely on a single drive and should keep an additional backup on another storage device or in a separate location.
Does an External HDD Need a Power Adapter?
This depends on the drive size and the individual model. External 2.5-inch HDDs are often powered directly through the USB connection. External 3.5-inch HDDs, on the other hand, usually require a separate power adapter.
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