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Write-Once-Read -Many
(WORM) SD and Micro SD Card

The Cost-Effective, Tamper-Proof Solution That Secures Your Data

In the world of WORM (write once read many) technology, old media such as CD ROM disk storage (CD-R / DVD-R), optical disk, zip disk, and even WORM tape have always been the options that consumers turn to when they wanted to contain “non-erasable” and “non-rewriteable” data. However, due to the technological advancement, these old media have been obsoleted and many consumers and enterprises are looking into SD / MicroSD cards to perform long-term data archival and to benefit from its portability and cheap costs.

Flexxon’s Write-Once-Read-Many (WORM) SD/MicroSD card eliminates the risk of having sensitive files deleted, modified, or overwritten while still granting read-only access to those who need it most.

Designed to meet even the most stringent compliance requirements, Flexxon WORM SD/MicroSD cards offer only the highest level of security to provide a tamper-proof way to ensure integrity protection.

Specifically built for applications where data reliability and safety are paramount, Flexxon WORM SD/MicroSD cards allow data to be permanently saved and unaltered for read access only. They also provide the benefit of time and date authentication which facilitates quick search, retrieval of archived files, and can provide extra security protection for stored data.

Once the data is saved into the write-once-read-many (WORM ) card, the information will be rendered completely unalterable, non-rewritable, and non-erasable regardless of any accidental or intentional commands from the host, providing a tamper-proof form of media product storage that’s secure, compatible, and cost effective.

Corporate environments, law enforcement agencies, and numerous government entities are already utilizing WORM cards to protect their secure content as Flexxon WORM SD/MicroSD cards provide an ideal solution for professional content distribution such as financial recordings, police investigations, court testimony, electronic voting and other applications where data files must be protected from alteration or deletion.

WORM SD Card Features

WORM SD Card Unalterable data storage feature

Unalterable data storage

The moment any illegal action is attempted on the existing card data, the WORM card will instantly transform into write-protect mode to ensure the highest data and integrity.

WORM SD Card Default WORM card mode feature

Default WORM card mode

Unlike other solutions of the market that require a specific software trigger to enable WORM card function, Flexxon SD Card are set to WORM card mode by default.

write once read many storage

100 years for data endurance

Up to 100 years of durable , unalterable data storage.

Other WORM SD CARD Features

write once read many drive power loss protection

Power loss protection

Secure your data against unexpected power shutdowns.

write once read many usb drive disturbance management

Read disturbance management

Avoid read-disturb errors, that cause data loss and enhance reliability.

usb flash drive write once read many auto read refresh management

Auto read refresh management

Good for read intensive applications that reduces the chances of uncorrectable errors, resulting from repeated read attempts.

write once read many disk smart function

Smart function

SMART info tools that shows you various parameters such as Endurance percentage, Erase count, total power on count, and bad block status.

How Write Once Read Many Storage Works

Flexxon WORM SD/MicroSD cards are designed to detect illegal behaviors performed by users and spring into counteractive action. If illegal behavior is detected, Flexxon WORM card will switch to a write-protect mode to secure the data in order to ensure its integrity at all times.

Once write-protect mode is enabled, the device must be restarted or the card must be ejected and re-inserted in order to write on the card again.

write once read many sd card design


Commercial Industrial
Interface SD 6.1
Speed Class Class 10
Flash Type MLC
Capacity 4GB ~ 32GB
Max. Performance Read: 72MB/s
Write: 15MB/s
Temperature Grade Commercial
-25˚C to 85˚C
-25˚C to 85˚C
-40˚C to 85˚C
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Write Once Read Many Card Application

write once read many flash at Bank and Financial Industries

Bank and Financial Industries

Protect sensitive financial industry, regulatory authority, and exchange commission records.

write once read many memory for Surveillance Camera

Surveillance Camera

Record surveillance, dashcam, event footage from security cameras.

write once read many sd card for Police Photography

Police Photography

Archive genuine and tamper-free police photography and audio recordings “black box” flight-data recorders.

write once read many usb for Electronic Voting

Electronic Voting

Ensure electronic voting records are recorded and made

write once sd card for Court Proceedings

Court Proceedings

Secure legal files for trials and depositions

write once micro sd card for Cash Register Data Logging

Cash Register Data Logging

Record financial data from cash registers for tax collection purposes

worm sd card for Medical Industry

Medical Industry

Track patient interactions with physicians and other health-care professionals. Also, retain confidential patient treatment data from medical devices such as AED Trainer, DICOM, and Medical Imaging systems.

write once read many sd card for Non-profit organisation

Non-profit organisation

Stores the financial transactions periodically for legal purposes.

write once read many for University


Keep confidential records digitally for their students to prevent any cases of physical records being destroyed or tampered.

write once read many storage for Businesses


Keep unalterable records so that employees cannot change its data to commit any fraud.

write once read many storage for Casino

Casino Management System

Ensure processing and recording of day to day casino operations and transactions are accurate without fraud or financial irregularities.