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Can you identify where you read this? {I'm missing it for some reason.} Which version of the update package have you downloaded?
The F4-421 does not support changing the BIOS boot order.chris0478 wrote: ↑04 Jul 2026, 22:15 Hi,
in the installation notes you wrote that I have to change my Boot Priority Order in the BIOS to the system HDD(s) as the first device. I'm running a F4-421 with 6.0.794 and MAPL0303V19.
After booting to BIOS I cannot change Boot Priority Order. This point seems locked. I tried switching from UEFI+Legacy to UEFI only and Legacy only. No chance to change anything. The system boots everytime from the "Built-In USB Device"
How can I do the Upgrade to TOS 7?
Best regards
Chris
I personally don't want to change the boot order - but I'm afraid that I will enter the installation interface after the update.... as written above and I break my system.6. If you have modified the BIOS boot order, before updating, adjust it so that the TOS system disk has priority over USB drives and other boot devices. Otherwise, the device may enter the system installation interface again after the update.
I suspect you misread it, sorry.
I don't recall seeing that little gem documented. I'm interested how that works.
If you skip this step, you will need to manually reconfigure the permissions for your shared folder; the permissions from TOS 6 will not be inherited.