[Help] How to manually rollback/reinstall TOS 5 on F4-212 (ARM) from TOS 7 Beta?

[sandeepbml]

Hello,

I recently upgraded my F4-212 to the TOS 7 Beta (7.0.0500). Since this version does not yet support essential apps like Docker, Jellyfin, Tailscale, and Surveillance Manager on this hardware, I need to downgrade back to TOS 5.

Official support informed me that rolling back is not supported on this specific model. I understand that the F4-212 uses an ARM-based architecture, meaning standard X86 boot recovery or standard USB Initboot methods might not apply out of the box.

Has anyone successfully wiped the system partition or forced a clean reinitialization/flash back to TOS 5 on an ARM-based model like the F2-212 or F4-212? Any guidance, custom scripts, or workarounds from advanced users to get this unit back to TOS 5 would be greatly appreciated.

Thank you!

[MikeZhang]

The TOS 7 Beta release announcement explicitly states this version no longer provides Surveillance Manager, iSCSI Manager, Portainer, Docker Manager, ZenTao, Verysync, or development tool applications. Please be sure to back up relevant data before upgrading. After upgrading to TOS 7, rolling back to TOS 5 / TOS 6 is not supported.