Capacity is one of the most important variables in SSD reselling. Understanding which capacity tiers sell fastest, and why, helps you allocate your sourcing budget to where demand is strongest.
What You Will Learn
Not all capacity tiers perform equally. This article breaks down how sales volumes distribute across capacities.
- Which capacities dominate sales rankings
- Why specific tiers sell better than others
- How to build a capacity-focused sourcing strategy
- Margin and turnover differences by capacity
Sales Volume Distribution by Capacity
Where the Volume Is
Across Amazon's Portable External SSD category, sales volume concentrates heavily in two tiers.
| Capacity | Share of Total Units Sold | Notes |
|---|---|---|
| 512GB | ~30% | Highest unit volume tier |
| 1TB | ~35% | Dominant tier by both units and revenue |
| 256GB | ~10% | Declining; buyers prefer 512GB at similar prices |
| 2TB | ~18% | Growing as prices fall |
| 4TB+ | ~7% | Niche; low volume but higher per-unit margin |
The 512GB–1TB Core
For most resellers, 512GB and 1TB represent the core of a practical sourcing strategy. Combined, they account for roughly 65% of unit volume in the category.
Why These Tiers Dominate
512GB: The Entry-Level Sweet Spot
512GB has become the minimum practical capacity for most buyers.
- Price accessibility: Typically $40–$75 for a portable SSD; affordable impulse purchase range
- Sufficient for most use cases: Enough for photo storage, OS backups, and typical document files
- Replaced 256GB: As 512GB prices have fallen, 256GB has become less attractive
- Fast turnover: Lower price point means faster purchase decisions
1TB: The Volume King
1TB is the most purchased capacity tier by both units and revenue.
- Professional standard: 1TB is now the expected baseline for content creators and professionals
- Future-proofing appeal: Buyers opting up from 512GB choose 1TB rather than 2TB for cost reasons
- Sweet spot pricing: $65–$115 for premium brands; within most buyers' discretionary budgets
- Broadest brand coverage: Every major brand offers 1TB, giving buyers maximum choice
2TB: The Growth Tier
2TB is growing as prices fall and buyers' storage needs expand.
- Video creators and photographers: 4K video files make 1TB insufficient quickly
- Price trajectory: 2TB prices have fallen to where they were viable only for 1TB a few years ago
- Upgrade buyers: Existing 1TB owners upgrading are a growing segment
256GB: The Declining Tier
256GB has been squeezed out of the mainstream.
- Price gap has narrowed: 512GB often costs only $10–$15 more, making 256GB poor value
- Use cases shrinking: Most modern use cases require more than 256GB
- Sourcing caution: Stock in this tier can sit; check demand carefully before sourcing
4TB+: The Niche Tier
4TB and above serves a specific high-need buyer.
- High per-unit price: $250–$400+ retail
- Narrow buyer pool: Mostly video production, large-scale archiving
- Higher margin potential: Less competition, but slower turnover
- Sourcing discipline required: Only source with confirmed demand and strong margin
Margin and Turnover by Capacity
How Capacity Affects Your Economics
| Capacity | Typical Margin | Typical Turnover | Recommended Strategy |
|---|---|---|---|
| 256GB | Low-Medium | Medium | Selective; only clear deals |
| 512GB | Medium | High | Core focus; source aggressively at target price |
| 1TB | Medium-High | High | Primary tier; highest priority |
| 2TB | Medium-High | Medium | Secondary; growing opportunity |
| 4TB+ | High | Low | Opportunistic only |
Absolute Dollar Profit vs. Margin
Higher-capacity tiers generate more absolute profit per unit even at similar margin percentages.
| Capacity | Typical Margin | Sale Price | Absolute Profit per Unit |
|---|---|---|---|
| 512GB | 20% | $60 | $12 |
| 1TB | 20% | $100 | $20 |
| 2TB | 20% | $155 | $31 |
| 4TB | 22% | $340 | $75 |
If you can sell 4TB drives, the per-unit return is substantially higher — but volume is limited.
Building a Capacity-Based Sourcing Strategy
For Beginners
Start with 1TB and 512GB only.
- Easiest to sell
- Most Keepa data available
- Most competitive pricing information available
- Lowest risk of getting stuck
For Intermediate Sellers
Add 2TB selectively once you have 1TB operations running smoothly.
- Source 2TB when you can hit 20%+ margin
- Verify demand with Keepa before committing
- Budget for slightly longer hold times than 1TB
For Advanced Sellers
Consider 4TB opportunistically when prices drop significantly.
- Only source with 25%+ margin given lower turnover
- Source one unit at a time until you have sold comps
- Track PS5-compatible NVMe 4TB drives separately — different buyer pool
Capacity Mix in Your Inventory
Suggested Portfolio Split
As a starting framework:
| Capacity | Suggested % of Sourcing Budget |
|---|---|
| 1TB | 50% |
| 512GB | 30% |
| 2TB | 15% |
| 4TB+ | 5% |
Adjust based on your own sales data as you build history.
Summary
1TB and 512GB together account for the majority of SSD sales volume, making them the natural core of any reselling operation. Understand why buyers choose each tier, build your sourcing discipline around 1TB as the primary focus, and expand to 2TB as your operations mature.
Recommended actions to take right now:
- Focus your first 10 sourcing decisions on 1TB: Build familiarity before diversifying
- Use Keepa to compare turnover across capacities: Keepa shows how rank behaves differently by model
- Track your actual sell times by capacity: Your own data will quickly confirm which tiers perform best in your specific market
This article is based on information as of January 2026. Capacity preferences shift over time as prices change — monitor trends regularly.