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Use an SSD for the OS and an HDD for bulk.
This guide is built from Amazon product listings and maker specs, not our own testing, so confirm compatibility, capacity and current price on each product page.
Prices are approximate and were shown on Amazon.com on November 1, 2026; check the current price.
Last updated: November 1, 2026.
Quick Picks
| Product | Type | Best for |
|---|---|---|
| MDD 4TB 7200RPM Internal Hard Drive | Desktop internal HDD | desktop PCs |
| WD Blue 4TB PC Internal Hard Drive (5400 RPM) | Desktop internal HDD | desktop PCs |
| Seagate BarraCuda 1TB Internal Hard Drive (7200 RPM) | Desktop internal HDD | desktop PCs |
| Seagate BarraCuda 4TB Internal Hard Drive (5400 RPM) | Desktop internal HDD | desktop PCs |
| Seagate BarraCuda 2TB Internal Hard Drive (7200 RPM) | Desktop internal HDD | desktop PCs |
Our Picks
1. MDD 4TB 7200RPM Internal Hard Drive
A MDD 4TB 7200RPM Internal Hard Drive (desktop internal hdd), per the listing. It showed at about $160 on Amazon.com on November 1, 2026.
Good for: desktop PCs. Watch out: Lesser-known brand.
2. WD Blue 4TB PC Internal Hard Drive (5400 RPM)
A WD Blue 4TB PC Internal Hard Drive (5400 RPM) (desktop internal hdd), per the listing. It showed at about $180 on Amazon.com on November 1, 2026.
Good for: desktop PCs. Watch out: 5400 RPM is slower.
3. Seagate BarraCuda 1TB Internal Hard Drive (7200 RPM)
A Seagate BarraCuda 1TB Internal Hard Drive (7200 RPM) (desktop internal hdd), per the listing. It showed at about $100 on Amazon.com on November 1, 2026.
Good for: desktop PCs. Watch out: Spinning disk speeds.
4. Seagate BarraCuda 4TB Internal Hard Drive (5400 RPM)
A Seagate BarraCuda 4TB Internal Hard Drive (5400 RPM) (desktop internal hdd), per the listing. It showed at about $210 on Amazon.com on November 1, 2026.
Good for: desktop PCs. Watch out: 5400 RPM is slower.
5. Seagate BarraCuda 2TB Internal Hard Drive (7200 RPM)
A Seagate BarraCuda 2TB Internal Hard Drive (7200 RPM) (desktop internal hdd), per the listing. It showed at about $151 on Amazon.com on November 1, 2026.
Good for: desktop PCs. Watch out: Spinning disk speeds.
How to Choose
3.5 vs 2.5 inch
Desktops use 3.5-inch; laptops use 2.5-inch.
Workload
NAS and surveillance drives are built for 24/7 use.
CMR vs SMR
Check recording type for NAS and RAID.
Frequently Asked Questions
Is 7200 RPM worth it?
Faster, but louder and warmer.
Can I use a desktop drive in a NAS?
Not recommended.
How do I install?
SATA cable and power connector.
Bottom Line
For cheap bulk storage in a PC, use 7200 RPM drives; pair with an SSD for the OS.
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- Best USB 3.0 Hubs for Multiple Drives
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- Best SATA to USB Cables for 2.5 and 3.5-Inch Drives