I had TOS7 installed on my F2-422 as follows.
viewtopic.php?p=53879#p53879

I followed exactly this way and had no issues with update.TMzethar wrote: ↑12 Jul 2026, 11:58 Yes, you can upgrade with an M.2 SSD first, then add four HDDs that were used with TOS 6 but don't have a system installed.
After the TOS upgrade, keep the NAS running and plug in the four HDDs while it's on. You can then assemble and mount them through Storage Management, or just run the script /etc/tos/scripts/mntdata in the terminal.

Please doanload update package: https://download3.terra-master.com/TOS% ... 171225.bz2




When the File Manager cannot be used to perform the operation, logging in via SSH and using the command line is usually the most direct and effective method.
Please open the link below to schedule remote session, let us check for you