My Edge reported new firmware available (its running on 7.0.26 now), Both Plus'es (running 7.0.26 beta and final) as well.
I'm upgrading Edge (my test/backup controller) and see what will happen.
Edit: Upgrade for Edge went smooth, I upgraded also one (less important) Plus. After upgrading I've got good old "can't write userdata" error, strange, because when I compared the system storage it was 92% filled before and after the upgrade. I have less memory in kB, OK, but the difference is 12Kb (664k vs 676k before upgrade).
Shouldn't make a difference, is this a sign of new troubles coming?
The funiest part is that this controller (19 physical devices, in 45 total) has bigger amount of system storage used (92%) than the main one (about 50 physical devices 140 in total, system storage used 90%).
I think I'm too dumb to understand this.