Flexible storage refers to the ability to keep API assets in different locations, such as local storage or controlled cloud environments. It matters when organisations need to balance developer convenience with security, compliance, and data handling rules. The main issue is governance over where sensitive development data resides.
Expanded Definition
Flexible storage in an NHI context describes how API assets, secrets-adjacent artefacts, and supporting development data can be retained in more than one approved location, including local environments and controlled cloud services. The concept is operational rather than architectural: the key question is not whether storage is possible, but whether the storage location, access path, retention period, and governance model are explicitly controlled.
Definitions vary across vendors, because some treat flexible storage as a convenience feature while others frame it as a data residency and governance pattern. For NHI security, it is most useful to treat flexible storage as a policy decision that must align with classification, change control, and access review. That makes it distinct from simple synchronisation or backup, because the risk is not redundancy alone. The risk is that sensitive development data can drift into places where visibility, encryption, logging, or jurisdictional controls are weaker than intended. Guidance from the NIST Cybersecurity Framework 2.0 is useful here because it ties asset governance to risk management rather than convenience.
The most common misapplication is treating flexible storage as a default permission to copy API assets into any workspace, which occurs when teams optimise for speed before setting storage policy boundaries.
Examples and Use Cases
Implementing flexible storage rigorously often introduces governance overhead, requiring organisations to weigh developer productivity against traceability, compliance, and containment of sensitive material.
- A platform team stores API test fixtures in a local encrypted volume during development, then migrates approved copies to a controlled cloud bucket once the release branch is frozen.
- A security team permits regional storage for regulated workloads, but only after confirming that access logs, encryption keys, and retention settings meet internal policy and the applicable jurisdiction.
- An engineering organisation uses a cloud workspace for shared collaboration, while keeping production-related API assets out of personal laptops and unapproved sync tools.
- A risk reviewer maps where secrets-adjacent data is stored across repositories, build agents, and cloud files, then flags locations that are not covered by formal retention rules.
- A governance team aligns storage choices with the same asset discipline described in the Ultimate Guide to NHIs, while applying the NIST view of risk-managed asset control from the NIST Cybersecurity Framework 2.0.
- After a misconfigured development environment exposes sensitive data, teams use a case such as the Google Firebase misconfiguration breach to reassess whether storage locations were approved, monitored, and segmented correctly.
Why It Matters in NHI Security
Flexible storage becomes security-relevant because NHI failures often begin with data being placed somewhere it should not have been, then remaining there without lifecycle review. When API assets, tokens, or related development data spread across local machines and cloud services, the organisation can lose confidence in where sensitive material resides, who can read it, and whether it is still needed. That uncertainty increases exposure to secrets leakage, unauthorised reuse, and audit failure.
This is especially important in NHI programs because service accounts and API keys are rarely managed as carefully as human identities. NHIMG research shows that 96% of organisations store secrets outside of secrets managers in vulnerable locations including code, config files, and CI/CD tools, which makes storage governance a practical control point rather than a theoretical one. Flexible storage can be legitimate, but only when the approved locations are narrow, documented, and monitored.
Organisations typically encounter the consequences only after a misconfiguration, leak, or access review uncovers unknown copies of sensitive data, at which point flexible storage becomes operationally unavoidable to address.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP Non-Human Identity Top 10 address the attack and risk surface, while NIST CSF 2.0, NIST Zero Trust (SP 800-207) and NIST AI RMF set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-02 | Storage location governance reduces the secret sprawl targeted by NHI-02. |
| NIST CSF 2.0 | PR.DS-1 | Data-at-rest protection applies to flexible storage of sensitive NHI-related data. |
| NIST Zero Trust (SP 800-207) | Zero Trust requires explicit verification before accessing distributed storage. | |
| NIST AI RMF | GV.1 | Flexible storage is a governance choice that should be risk-assessed and documented. |
Define storage policy, assign owners, and assess residual risk for each location.
Related resources from NHI Mgmt Group
- What is the difference between secret storage and secret governance for agents?
- Should organisations centralise secret storage or standardise secret governance first?
- What is the difference between vault storage and secrets governance?
- What is the difference between secret storage and credential governance?
Deepen Your Knowledge
Reviewed and updated by the NHIMG editorial team on August 28, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
