@David-TP Hi!

my decos are all up to date:

here's the picture of the advanced page:

Can the issue be the fact that I'm not using a BE as primary? I mean I don't think so, it would be so silly

Hi  @David-TP,

as I had the chance to try I tried first by setting one of the BE65s as main unit. 

This has fixed both the issue with the firmware update not showing and the missing USB section inside the Advanced section

Everything now seems to be working properly but for some reason now that I've enabled TimeMachine, while my Mac can see the TimeMachine partition can no longer see the others, making impossible to use the media sharing feature as I am not able to copy content into it

I was able to access it using the IP of the BE65 where the hd is attached but I hope there's an easier way

  @David-TP yes.

Before I had access to the USB section and I was able to enable Time Machine, I could see and access the network harddrive and all three partitions in Finder but TimeMachine couldn't see the partition I wanted to use for it. Now that I've enabled the TimeMachine, that is working fine, but my finder no longer sees the other partitions of the network hard drive. 

If I access the HD using the IP, I'm then able to see all of them. 

I made two videos, in the first you can see that once logged in the HD only the Time machine backup folder is shown, while the second shows that using the IP all three are visible

https://streamable[.]com/j8siui

https://streamable[.]com/7n5bvo

Yes, the Mac sees the partitions just fine when directly connected (that's how I created them) and everything works properly when the time machine feature of the deco app is disabled. Well, everything except TimeMachine