How Should Government-Owned Removable Media Be Stored?

The Short Answer

Government-owned removable media should be stored in an approved secure location when not in use, protected from unauthorized access, clearly labeled according to agency rules, encrypted when it contains sensitive data, and handled only by authorized personnel. If the media contains classified information, it must be stored in an approved security container, vault, or other authorized storage area that meets federal requirements.

Removable media includes USB drives, external hard drives, CDs, DVDs, memory cards, and other portable storage devices. Because these devices are small and easy to lose, they create both physical-security and cybersecurity risks.

The storage method should match the sensitivity of the data, not merely the size of the device.

Why Removable Media Is Risky

Removable media is useful because it can transfer data quickly. That usefulness is also the problem. A small drive can hold thousands of files, including personally identifiable information, law-enforcement records, operational data, classified material, or controlled unclassified information.

CISA warns that data stored on removable media can be exposed if devices are not properly protected. NIST also notes that portable storage media can introduce cybersecurity risks, including malware transfer and unauthorized data movement.

Store It in an Approved Secure Location

When government-owned removable media is not being used, it should not be left on desks, in unlocked drawers, in vehicles, or plugged into unattended systems. It should be stored in a location approved by the agency or organization.

Depending on the information, that may mean:

• A locked office cabinet for low-risk administrative media.
• A controlled access area for sensitive unclassified information.
• An approved locked container for controlled or mission-sensitive material.
• A GSA-approved security container for classified national security information.

The more sensitive the data, the stronger the required physical protection.

Classified Media Requires Stronger Storage

If removable media contains classified information, it must be treated as classified material. GSA explains that classified national security information cannot be stored in non-GSA-approved security containers. Federal rules also require classified material to be stored in approved security containers, vaults, or authorized open storage areas.

That means a classified USB drive is not “just a USB drive.” It is classified material in portable form.

Media type	Storage expectation
Public or routine data	Follow agency storage rules and basic physical control.
Sensitive unclassified data	Use access controls, encryption, and approved storage.
Controlled unclassified information	Follow agency CUI handling, encryption, and storage rules.
Classified information	Store in approved classified storage containers or areas.

Encrypt Sensitive Data

CISA recommends encrypting devices, hard drives, removable media, laptops, and documents that contain sensitive government data. Encryption helps protect the information if the device is lost or stolen.

Encryption does not replace physical security. A locked container and encryption serve different purposes. Physical controls reduce the chance of loss or theft. Encryption reduces the chance that someone can read the data if the media is compromised.

Label and Track the Media

Government-owned removable media should be labeled according to agency policy. The label may identify ownership, classification level, CUI marking, media number, or handling restrictions. The exact marking depends on the agency and information type.

Tracking matters too. Agencies may require logs showing:

• Who has the media.
• What system it is used on.
• When it was checked out.
• When it was returned.
• Whether it was scanned for malware.
• When it was sanitized or destroyed.

Without accountability, removable media can disappear quietly.

Limit Who Can Use It

Only authorized personnel should handle government-owned removable media. Users should not plug unknown drives into government systems, use personal USB drives for government files, or transfer data outside approved channels.

Many agencies restrict removable media use because malware can spread through portable drives. NIST recommends procedural, physical, and technical controls to reduce risks from portable storage media.

Scan and Control Devices Before Use

Before removable media is used on government systems, it should be checked according to agency procedures. This may include malware scanning, disabling autorun, using approved media only, and limiting use to specific devices or networks.

In higher-risk environments, such as operational technology or industrial control systems, removable media controls are especially important because a single infected device can affect critical operations.

Sanitize or Destroy When No Longer Needed

Government-owned removable media should not simply be thrown away. When it is no longer needed, the data should be sanitized or the device destroyed according to agency policy and federal records/security rules.

Sanitization means making data unrecoverable using an approved method. Destruction may be required for damaged, obsolete, or highly sensitive media.

Bottom Line

Government-owned removable media should be stored securely, encrypted when it holds sensitive data, labeled properly, tracked carefully, and accessed only by authorized users. Classified removable media must be stored in approved classified storage containers or authorized areas.

The safest rule is simple: treat removable media according to the highest sensitivity level of the information it contains.