AI inference storage costs grow 130x output size
Current overview (not historical)
AI inference processes generate backend data 130 times the output size, driving storage costs. A WD-sponsored survey found 95% of IT decision makers reported data volume increases due to generative AI, with 61% seeing growth over 25%. McKinsey projects inference demand will grow at 35% CAGR through 2030, making up over 40% of total data center demand. WD's internal measurements show an 8-second AI video clip generating over 500MB of backend data (logs, cached context, renders, backups, safety records) despite a 3.97MB user output.
Written with AI from the reporting · updated 10/22/2026
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- 1Unclassified fact stationOct 22, 00:00recorded Oct 22, 18:06single source
AI inference storage costs grow 130x output size
Read original source ↗ MIT Technology Review · AIReplay this moment in the explorerEvidence & revisions · 1 source records
- Subject：
- WD
- Action：
- 调查并报告 AI inference 留存数据成本
- Object：
- AI inference 留存数据（包括 logs、cached context、renders、backups、safety records）
- Occurred (fact side)：
- Oct 22, 00:00
- Published (valid side)：
- Oct 22, 16:41
- First seen (known side)：
- Oct 22, 18:06
Fact stationSingle source · one-sided claimCopy may have been revised later; time replay is bounded. Layer labels group reading only, not causation between layers.
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- MIT Technology Review · AIRelated fact: single sourceAI Inference Generates Significant Hidden Data Storage Costs Beyond Output Files
Report first recorded Oct 22, 18:06
AI inference creates substantial back-end data footprints that are often overlooked in infrastructure planning. For instance, internal measurements from WD found that an 8-second 720p AI-generated video clip resulted in over 500MB of associated back-end data (including logs, cached context, and safety records), which is 130 times the 3.97MB output file size. McKinsey projects AI inference demand will grow at a 35% CAGR through 2030, surpassing training growth (22%) and accounting for over 40% of total data center demand by the end of the decade. A WD-sponsored IDC global white paper surveyed 763 IT and business decision makers, finding nearly 95% reported increased data volume due to generative AI in the past 12 months, with 61% reporting 25% or more growth.
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