Storage Disk Prices is a free price comparison tool that helps you find the best deals on hard drives, SSDs, and other storage devices from Amazon. We calculate the price per terabyte ($/TB) for each drive, making it easy to compare value across different capacities and brands. Our database includes over 1,000 products updated hourly.

Price per TB (terabyte) is calculated by dividing the total cost of a drive by its storage capacity in terabytes. For example, a $200 drive with 10TB capacity has a price per TB of $20. This metric is crucial because it lets you compare the true value of drives with different capacities. A $100 4TB drive ($25/TB) is actually worse value than a $180 8TB drive ($22.50/TB), even though the upfront cost is lower.

Our prices are updated every hour using Amazon's Product Advertising API. The exact time of the last update is displayed at the bottom of the comparison table. Keep in mind that prices and availability can change between updates, so the final price at checkout may differ slightly.

All prices are sourced directly from Amazon.com through their official Product Advertising API. We display the current listed price including any active discounts or deals. We do not inflate prices or add hidden fees. The price you see is the price on Amazon at the time of our last update.

The cheapest price per TB varies based on drive type and market conditions. Currently:

• HDDs: $10-15/TB for high-capacity enterprise drives (16TB+)
• Consumer HDDs: $15-25/TB for 8TB+ models
• SSDs: $50-80/TB for SATA SSDs
• NVMe SSDs: $60-100/TB depending on speed tier
• Used/Refurbished: Can be 30-50% cheaper than new

Check our homepage for real-time pricing sorted by $/TB.

The "sweet spot" for price per TB is typically 12TB to 18TB drives. Here's why:

• Small drives (under 4TB): Poor $/TB due to fixed manufacturing costs
• Mid-range (8-12TB): Good balance of price and capacity
• High-capacity (12-18TB): Usually the best $/TB value
• Newest/largest (20TB+): Often carry a "new technology" premium

Pro tip: Last-generation flagship drives often offer the best value as newer models push prices down.

It depends on your use case:

Choose HDD when:

• You need maximum storage capacity
• Building a NAS or backup system
• Storing media libraries, archives, or cold data
• Budget is the primary concern (HDDs are 4-5x cheaper per TB)

Choose SSD when:

• Speed is critical (boot drives, games, video editing)
• You need silent operation
• The drive will be moved frequently (laptops, external)
• Power efficiency matters

Best approach: Many users combine both — SSD for operating system and frequently-used applications, HDD for bulk storage.

Used enterprise drives can offer excellent value (30-50% cheaper), but consider these factors:

Good candidates for used drives:

• RAID arrays where redundancy protects against failure
• Non-critical backup storage
• Testing and development environments

Tips for buying used:

• Check seller ratings and return policies
• Look for drives with low power-on hours
• Enterprise drives (HGST, Seagate Exos) are built for longer life
• Verify SMART data if possible

When to buy new: Critical single-drive storage, primary system drives, or when warranty protection is important.

SATA (Serial ATA):

• Standard interface for consumer drives
• Speeds up to 600MB/s (SATA III)
• Compatible with virtually all PCs
• Available for both HDDs and SSDs
• Best for: General use, budget builds, bulk storage

NVMe (Non-Volatile Memory Express):

• Connects via PCIe for much faster speeds
• Speeds of 3,500-7,000MB/s (PCIe 4.0)
• Requires M.2 slot or PCIe adapter
• SSDs only (no NVMe HDDs)
• Best for: Gaming, video editing, professional workloads

SAS (Serial Attached SCSI):

• Enterprise-grade interface
• Better reliability and multi-path support
• Requires SAS controller (not on consumer motherboards)
• Common in servers, NAS, and data centers
• Best for: Enterprise, NAS builds, high-reliability needs

CMR (Conventional Magnetic Recording):

• Traditional recording method
• Consistent read/write performance
• Better for NAS, RAID, and frequent writes
• Recommended for most use cases

SMR (Shingled Magnetic Recording):

• Overlapping tracks allow higher density
• Often cheaper per TB
• Slower write speeds, especially for random writes
• Can cause issues in RAID arrays
• Best for: Archive storage, sequential writes only

Our recommendation: Choose CMR drives for NAS, RAID, or any workload with frequent writes. SMR is acceptable only for pure archive/backup where data is written once and rarely modified.

Based on Backblaze's annual drive reliability reports and industry data:

Enterprise HDDs (Most Reliable):

• HGST / WD Ultrastar — Consistently lowest failure rates
• Toshiba Enterprise (MG series) — Excellent reliability
• Seagate Exos — Strong enterprise performance

NAS Drives:

• WD Red Plus / Pro — Popular choice, good reliability
• Seagate IronWolf / Pro — Strong performer, includes data recovery
• Toshiba N300 — Often overlooked but reliable

Consumer Drives:

• Reliability varies more by model than brand
• Check reviews for specific models
• Avoid mixing drives in RAID if possible

Use the brand filter on our homepage to compare options from specific manufacturers.

The "Prime" indicator shows products eligible for Amazon Prime benefits:

• Free two-day (or faster) shipping for Prime members
• Often indicates the product is sold/fulfilled by Amazon
• Usually means easier returns and customer service

Non-Prime items may have additional shipping costs or longer delivery times. Factor this into your total cost calculation when comparing deals.

Follow these steps to find the best storage deal:

1. Select drive type: Choose HDD, SSD, or specific interface based on your needs
2. Set minimum capacity: Filter out small drives with poor $/TB ratios
3. Choose condition: New for warranty, Used for maximum savings
4. Sort by $/TB: Lowest price per terabyte first
5. Compare similar drives: Look at drives within the same capacity range
6. Check Prime eligibility: Factor in shipping costs for non-Prime items
7. Verify on Amazon: Click through to confirm current price and availability

Products may not appear for several reasons:

• Out of stock: We filter out unavailable products
• Low sales rank: Amazon's API limits queries; low-volume products may be excluded
• Filtered as spam: We remove suspected counterfeit or misleading listings
• Not categorized: Some products can't be automatically classified
• Recently listed: New products appear after our next update cycle

If you believe a legitimate product is missing, please contact us with the Amazon ASIN and we'll investigate.

Yes, we participate in the Amazon Services LLC Associates Program. When you click a product link and make a purchase on Amazon, we may earn a small commission at no additional cost to you. This helps us maintain the site and keep it free to use.

Important notes:

• We never inflate prices — you pay the same as going directly to Amazon
• Our sorting and rankings are based purely on price per TB, not commission rates
• We don't accept payment for product placement

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