Storage Capacity Planning: How Much TB Do You Need?

By Zoltan LukacsiUpdated June 11, 2026

Methodology: Rankings are based on daily Amazon prices via Keepa, third-party benchmark data (CrystalDiskMark, 3DMark, Cinebench), and category-specific Value Score formulas. No sponsored placements — every product is evaluated the same way.

Buying too little or too much storage wastes money. Here's exactly how much TB you need based on your use case.

Common capacity needs

OS + apps: 100-150GB. Games library (20 games): 500GB-1TB. Photos (10 years): 200-300GB. 4K video (100 hours): 1-2TB. Music (10,000 songs): 50-100GB. Total for power user: 2-3TB internal.

Browse NVMe SSDs →Gaming PC build →

Gaming only: 512GB or 1TB?

512GB = OS (100GB) + 5-8 modern games (350GB) = full. Not enough for installing new games. Buy 1TB minimum. 2TB recommended if you want 15+ games installed simultaneously.

Samsung 990 Pro 1TB → →WD Black SN850X 1TB → →

Video editing: Capacity calculator

1080p 30fps: 5 GB/hour. 4K 30fps: 40-100 GB/hour. 8K 60fps: 500 GB/hour. Project: 20 hours 4K = 800GB project space + 200GB cache + 500GB scratch = 1.5TB minimum internal + 2TB external backup.

Photo storage: 256GB or 512GB?

200 photos/month = 500GB over 5 years. Add OS (100GB): 600GB total. 512GB is tight. 1TB comfortable. Photographers: 2TB minimum + cloud backup.

Backup storage rule

3-2-1 rule: 3 copies of data, 2 different media (SSD + HDD), 1 offsite. If internal 1TB: need external 2TB + cloud 500GB minimum.

Buy this much storage

Light user (web, office): 512GB. Gamer: 1TB. Creator (photos/video): 2TB internal + 2TB external. Enterprise: 4TB+ with RAID.

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Frequently Asked Questions

Is 256GB SSD enough for a laptop in 2026?

Barely. OS (30GB) + apps (50GB) + Windows updates (50GB) + user files (50GB) = 180GB used, leaves 76GB free. Windows gets slow below 10% free (26GB). Dangerous. Buy 512GB minimum.

Can I fill an SSD completely without breaking it?

Technically yes. Practically no. Performance tanks below 10% free space. OS starts paging to HDD. Buy 20% more than you think you need.

Is it better to buy one big drive or two small drives?

One big drive = simpler, less power use, cheaper. Two small = redundancy if one fails. For important data: two drives + RAID 1.

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