Steam Storage Calculator
Plan your gaming drive with confidence. Get category-specific size estimates for AAA, indie, online, and VR games — plus an SSD/HDD recommendation with a 20% growth buffer.
Real-World Averages
Size averages sourced from PCGamingWiki and SteamDB depot data — AAA 70 GB, Indie 3.5 GB, Online 40 GB, VR 20 GB.
Individual Games Vary
Some AAA games exceed 150 GB with all DLC. Treat category averages as planning baselines, not exact per-game sizes.
Steam Storage at a Glance
How much drive space your Steam library actually needs
A typical modern Steam library with 5 AAA games, 20 indie games, 3 online games, and no VR totals around 540 GB — just over half a 1 TB drive. Add a couple more AAA titles with their DLC, and you're staring down a 1 TB upgrade. Understanding where the space goes lets you choose the right drive instead of overbuying or running out mid-sale.
Quick Answer: Storage needed = (AAA × 70 GB) + (Indie × 3.5 GB) + (Online × 40 GB) + (VR × 20 GB). Add a 20% growth buffer, then round up to the nearest standard drive: 500 GB, 1 TB, 2 TB, or 4 TB.
Not all games are created equal. The difference between a bloated AAA open-world game and a tight indie platformer is often 20× — and that gap grows every year.
| Category | Average Size | Typical Examples | Range |
|---|---|---|---|
AAA | ~70 GB | Call of Duty, GTA V, Cyberpunk 2077, Red Dead Redemption 2 | 50–175+ GB |
Online | ~40 GB | Destiny 2, Apex Legends, Fortnite, Warframe | 20–120 GB |
VR | ~20 GB | Beat Saber, Pavlov, Blade & Sorcery | 2–70 GB |
Indie | ~3.5 GB | Celeste, Hollow Knight, Hades, Stardew Valley | 0.5–15 GB |
AAA: The Space Eaters
High-resolution 4K textures, extensive voiceover across dozens of hours of dialogue, and massive open worlds. Call of Duty routinely ships at 200+ GB with DLC. Most storage upgrade decisions start here.
Online: Steady Growers
Start reasonable, grow over time. Fortnite, Destiny 2, and Warframe add new seasons, weapons, and maps with each update — a 40 GB game can easily reach 80 GB over 18 months of live service.
VR: Bimodal Distribution
Most VR games are small (2–10 GB) because the environments are focused. The outlier is narrative VR like Half-Life: Alyx (~67 GB), which plays by AAA rules.
Indie: The Efficient Ones
Small download, big gameplay. 20 indie games fit comfortably in the space of one AAA game — a reason dedicated indie players rarely need to upgrade drives.
The math is a weighted sum with a growth buffer. Category averages come from PCGamingWiki and SteamDB depot data; the 20% buffer is industry-standard planning practice for storage that will see growth over 2–3 years.
The 20% buffer isn't optional — game sizes grow at roughly 10–15% per year as engines ship larger assets. A drive exactly sized to your current library will be full inside 18 months. The buffer keeps you ahead of the curve without buying double what you need.
Capacity is only half the decision. The type of drive matters increasingly — some modern games require SSDs as a minimum spec.
NVMe SSD — The Gaming Default
50–80% faster load times than HDDs. Smoother texture streaming with fewer pop-in glitches. Required for some newer AAA titles (e.g., Star Wars Jedi: Survivor, Ratchet & Clank: Rift Apart). Best for your active 10–20 games.
HDD — Backup Library
Slow but cheap per GB. 4 TB for ~$80 vs. 4 TB NVMe at 3–4× the price. Ideal for games you might play — not the ones you're actively in. Load times are noticeably longer, but storage capacity is huge.
The Tiered Storage Approach
- Tier 1: NVMe SSD (1–2 TB)
Your boot drive plus active games. OS, game engine cache, and the 10–20 games you're currently playing. Fast, quiet, and expensive per GB — so don't oversize this.
- Tier 2: Secondary SSD or HDD (2–4 TB)
Your passive library. Games you've finished, multiplayer titles for occasional returns, and backlog. Slower, but cheap per GB. HDD works fine here for most games.
- Tier 3: External / NAS (optional)
For cold storage — games you won't touch for 6+ months. A cheap 8 TB external HDD holds an entire typical Steam library with room to spare.
Steam's built-in Storage Manager (Settings → Storage) makes moving games between drives effortless — no re-download required. Use it to migrate finished games from your SSD to secondary storage as you complete them.
| Library Needs (with buffer) | Recommended Drive | Best Fit For |
|---|---|---|
| < 500 GB | 500 GB NVMe | Indie-focused library, 1–2 AAA rotating |
| 500 GB – 1 TB | 1 TB NVMe | Most common sweet spot — mixed library, 5–10 AAA, ongoing online games |
| 1 TB – 2 TB | 2 TB NVMe | Enthusiast library, 15+ AAA, multiple live-service titles |
| 2 TB – 4 TB | 4 TB NVMe or HDD | Massive library, VR collection, content creator / streamer setup |
Before buying a new drive, try freeing space on what you already have. Steam-specific housekeeping routinely recovers 100+ GB without removing anything you actually play.
Find the Hogs
Steam → Settings → Storage lists every installed game by size. The top 5 usually account for 60%+ of your library's total. Uninstall the ones you haven't launched in 6 months — Steam remembers your save data and you can re-download anytime.
Skip Optional Content
Many AAA games let you opt out of high-res texture packs (10–40 GB), language files you don't need (1–5 GB each), and multiplayer modes in single-player-focused play. Check each game's DLC/Properties tab.
Disable Auto-Updates
Right-click game → Properties → Updates → "Only update this game when I launch it". Huge benefit for live-service games you play rarely — prevents 10+ GB patches from downloading while you're not playing.
Move, Don't Reinstall
Right-click game → Properties → Installed Files → Move Install Folder. Relocates the game to another drive without re-downloading. A minute of clicking saves hours of waiting.
The Bottom Line
Use the 70/40/20/3.5 rule (AAA/Online/VR/Indie average sizes) to estimate. Add a 20% buffer. Round up to 500 GB, 1 TB, 2 TB, or 4 TB. For most gamers, a 1 TB NVMe SSD is the sweet spot — fast, roomy, and within consumer pricing.