Second Hard Drive

Updated September 20, 2026

Overview

Product sourcing insights & recommendations

27 来源

The phrase "second hard drive" refers to a growing market segment focused on storage expansion for PCs and laptops. While primary drives have shifted heavily toward SSDs, the "second drive" is increasingly becoming a high-capacity HDD for cold storage, media libraries, and AI-driven data hoarding. Mordorintelligence Forbes

Core Product Segments

1High-Capacity 3.5" Internal HDDs: For desktop users, the "second drive" sweet spot has moved to 8TB–20TB models. Mordorintelligence These are primarily used for gaming libraries and 4K video storage due to a 2.5× to 4× cost advantage over SSDs. Businessresearchinsights
2Optical Bay Caddies (ODD Caddy): A popular laptop modification where the internal CD/DVD drive is replaced by a 9.5mm or 12.7mm SATA adapter to house a second 2.5" SSD or HDD. Amazon Alibaba
3External USB Enclosures: Enclosures supporting SATA to USB 3.0/3.1 enable users to turn old drives into a "second" portable storage solution. Newegg

Market Trends & Insights

* Capacity Over Speed: For secondary drives, consumers are prioritizing ultra-high capacity (10TB+) and cost-per-TB over pure performance. Mordorintelligence

* Price Volatility: Average pricing sits around $15/TB, but supply chain concentration (Seagate, WD, and Toshiba control 95% of the market) makes prices sensitive to AI-driven demand and regional tariffs. Mordorintelligence Reddit

* Trending Demand: Google Search trends for "second hard drive" peaked in mid-2026, showing a sustained interest in DIY storage upgrades despite the rise of cloud storage.

Product Identification

The provided files contain detailed sourcing data for high-capacity internal drives, universal laptop caddies, and dual-disk external enclosures.

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Sources & References

27 sources cited · Verified industry data & reports

Hard Disk Drive Market Trends, Growth & Segmentation

Mordor Intelligence

Hard Disk Drive market size in 2026 is estimated at USD 51.82 billion, growing from 2025 value of USD 48.83 billion with 2031 projections ...

Hard Disk Drive Market Forecast & Size Insights 2026–2035

Business Research Insights

With a valuation of USD 47.52 billion in 2026, the Hard Disk Drive Market is set to expand to USD 65.11 billion by 2035, growing at 3.56% CAGR.

Digital Storage And Memory Projections For 2026, Part 1

Forbes

HDD capacity shipments are estimated to increase about 34% from 2024 to 2025, to about 1.79 ZB. We project total HDD capacity shipments will be ...

Prices just keep going up and up? : r/DataHoarder

Reddit · r/DataHoarder

Back in 2024 I was buying 18TB Iron Wolf drives for $10/TB. In 01/2026 I was only able to find 22TB drives for around $12.30/TB. Now, one month ...

Hard disk Market: Global Industry Analysis and Forecast

maximize market research

The Hard disk Market size was valued at USD 64.67 Billion in 2025 and the total Hard disk revenue is expected to grow at a CAGR of 5.2% from 2026 to 2032, ...

Hard Disk Drive (HDD) Market Size & Future Growth, 2033

Persistence Market Research

The global hard disk drive (HDD) market size is set to reach US$ 44.3 Bn in 2026 and grow to US$ 67.9 Bn by 2033, at a CAGR of 6.3% from 2026–2033.