What is a Hard Disk (HDD)? Types, Uses & Best Picks (2025)
A hard disk drive (HDD) is a non-volatile data storage device that uses magnetic disks to store and retrieve digital information. HDDs have been the backbone of personal and professional storage for decades due to their large capacities and affordability.
Common Uses of Hard Disks
- Store operating systems, apps, photos, and videos in PCs/laptops
- Backup drives for important family, office, or project files
- External disks for transferring movies, games, or bulky content
- Security camera/DVR storage, office backup appliances
Types of Hard Disks
| Form Factors | 3.5" (PCs, desktops), 2.5" (laptops, portables) |
|---|---|
| Type | Internal (SATA/IDE), External (USB, Type-C) |
| Speed | Typically 5400rpm (energy saving) or 7200rpm (faster) |
| Capacity | 500GB, 1TB, 2TB, 4TB, 6TB, 10TB+ |
Top 5 Hard Disks on Amazon India (2025)
Seagate Expansion 2TB External USB 3.0 HDD
Reliable portable storage, plug-and-play for PC, Mac, TV, and more.
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WD Elements 2TB Portable Hard Drive USB 3.0
Trusted brand, lightweight and robust for everyday backups.
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Toshiba Canvio Basic 1TB Portable HDD
Simple, shock-resistant build and USB 3.2 support.
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Seagate Barracuda 2TB 3.5" Internal HDD (SATA)
Best for desktops, gaming PCs, and CCTV storage.
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WD Blue 500GB 2.5" Internal Laptop HDD
Affordable, popular upgrade for older laptops.
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🔥 Disclosure: This post includes Amazon affiliate links; purchases support the blog at no extra cost to you.
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