Overview#
An active investigation generates a constant stream of video, audio, and image evidence. Most of it is accessed frequently in the first weeks, then rarely touched once the case moves to prosecution or archive. Keeping all of it on high-performance storage indefinitely is expensive and unnecessary. The Media Storage Optimisation module monitors access patterns across every file in the evidence repository and moves data automatically through storage tiers on Cloudflare R2, from fast-access hot storage to cost-effective cold archive, without any manual intervention and without ever compromising forensic integrity.
For large agencies, military intelligence units, or surveillance operations accumulating terabytes of footage daily, this is not a convenience feature. It is the difference between a scalable evidence repository and one that requires constant manual management to stay within budget.
Key Features#
- Intelligent storage tiering with automatic migration between hot, warm, and cold tiers on Cloudflare R2
- Format-appropriate compression applied without quality degradation to forensic evidence
- Access pattern analysis driving automatic tier placement decisions based on real usage
- Cost optimisation reducing storage expenditure while maintaining defined access response times
- Deduplication detecting and eliminating redundant evidence copies while preserving all case references
- Storage analytics with usage reporting and cost forecasting for budget planning
- Configurable tiering policies based on age, access frequency, and evidence classification
- Forensic integrity preserved through all storage operations via cryptographic hash verification
Use Cases#
- Automatically moving ageing evidence to cost-effective cold storage tiers as active investigation phases complete
- Applying intelligent compression to media evidence across large surveillance collections to reduce repository size without impacting review quality
- Identifying and eliminating duplicate evidence files that accumulate when the same footage is captured from multiple sources or uploaded more than once
- Forecasting storage costs and capacity requirements to support annual budget planning for evidence management infrastructure
Integration#
Media Storage Optimisation connects with evidence management, the compliance and retention module, and storage infrastructure. All tier transitions are logged in the audit trail. Cryptographic hashes are verified at each transition point to confirm forensic integrity is maintained throughout the evidence lifecycle.
Open Standards#
- RFC 6962 (Certificate Transparency): The evidence Merkle ledger uses RFC 6962 domain-separation prefixes to distinguish leaf hashes from internal-node hashes, ensuring the append-only chain-of-custody record cannot be forged during storage tier transitions.
- NIST FIPS 180-4 (SHA-256): Every evidence file is fingerprinted with a SHA-256 digest that is verified at each tier migration point and embedded in the Merkle tree, guaranteeing forensic integrity without reliance on storage-layer metadata.
- NIST FIPS 197 (AES-256): Server-side encryption at rest (SSE-S3/AES-256) is enforced on every object written to Cloudflare R2, covering all hot, warm, and cold tier placements.
- S3-Compatible API / AWS Signature Version 4: Storage operations and time-limited presigned download URLs are issued through the S3-compatible interface using HMAC-SHA-256 request signing, allowing tier management tooling to interoperate with any S3-compliant client.
- RFC 7233 (HTTP Range Requests): Byte-range streaming is implemented to serve large video and audio evidence files directly from whichever tier holds them, avoiding full-object retrieval and supporting media players that request partial content.
- IANA MIME Type Registry (RFC 2046): Evidence files are catalogued and classified by MIME type throughout the tiering pipeline, driving format-appropriate compression decisions and safe content-disposition handling on retrieval.
- ISO 8601: All tier-transition timestamps, audit log entries, and presigned URL expiry values are serialised in ISO 8601 format, ensuring interoperability with downstream case-management and compliance systems.
Last Reviewed: 2026-02-05 Last Updated: 2026-04-14