Asustor Need to Upgrade AS3204T from 2.7.2 RHI1

[Pradhyu]

I am currently using an AS3204T NAS running ADM version 2.7.2.RHI1 and would like to upgrade it to the latest supported version.

However, I understand that this model requires step-by-step upgrades and that ADM 4.0.x is the final supported version.

Unfortunately, I am unable to find older intermediate firmware versions (such as ADM 3.0.x and 3.5.x) for this model on the official website.

Could you please provide:

1. The correct upgrade path from ADM 2.7.2.RHI1 to ADM 4.0.x
2. Download links for the required intermediate firmware versions
3. Any precautions or special instructions for this upgrade

Thank you for your support.

 

[Dami1]

Hi @Pradhyu,

Thank you for your detailed message and for taking the time to outline your situation — this really helps.

I’ve reviewed your case regarding the ASUSTOR AS3204T currently running ADM 2.7.2.RHI1, and I’d like to guide you through the safest and most reliable upgrade approach.

You are absolutely correct: due to architectural and file system changes across major ADM versions, a direct upgrade is not supported. The system must be upgraded progressively to maintain data integrity and system stability.

Please follow this sequence carefully:

• ADM 2.7.x → ADM 3.0.x / 3.1.x
• ADM 3.0 / 3.1 → ADM 3.2.x / 3.3.x
• ADM 3.2 / 3.3 → ADM 3.5.x (latest: 3.5.9)
• ADM 3.5.x → ADM 4.0.x

Each step ensures that system components and internal structures are properly migrated before moving forward.

​

Older ADM versions depend on deprecated technologies (such as NPAPI), which are no longer supported by modern browsers.

To ensure the upgrade interface works correctly, please temporarily install:
Mozilla Firefox 52.0 ESR
https://ftp.mozilla.org/pub/firefox/releases/52.0esr/win32/en-US/

Important recommendations:

• Do not update this browser during the process
• Use it only for the upgrade steps
• Once the upgrade is complete, remove it or update to a secure, modern version

All required intermediate firmware versions are available here:
https://www.asustor.com/en/service/downloads_all_adm?product_id=47

To minimize any risk, please ensure the following:

• Perform a complete backup of your data (external storage recommended)
• Upgrade applications via App Central after each major ADM step
• Do not skip any major versions
• Be aware that downgrades are not possible once certain versions are installed
• Only install ADM 4.0.x after successfully reaching ADM 3.5.x
• Expect performance limitations due to the hardware specifications of this model

Given the number of steps involved, I strongly recommend proceeding gradually.
If you’d like, I can:

• Validate each step with you before proceeding
• Review your current system status (logs, screenshots if needed)
• Assist you in case of any unexpected behavior during the upgrade

My goal is to ensure this upgrade is completed safely and without any data loss.

You can also reach our community here if needed:
https://forum.asustor.com/

Best regards,
Damien