Well, back for more testing on a clean install of windows 11.
So i noticed that I can easily reproduce this problem (with aura freezing on the hard drive, the infinite loading in the Aura Sync peripherals menu ...) just by restarting the computer with the hard drive still connected.
During the windows login screen, Aura sync kicks in fine on every peripherals but as soon as I login, and Icue starts to sync the ram sticks ( I have some Corsair Vengeance Pro RGB SL), the rgb on the hard drive freeze and the infinite loading on Armoury Crate is back, that I can fix by unplugging the hard drive.
So it's maybe an Icue problem, a Icue aura pluggin problem or symply the hard drive firmware that need some tweaking (I tend to think it's that as that's the only Aura device that's cause this problem)
Oh and one last thing: as I was testing all my USB ports while doing this, I noticed that I can't restart my computer with the EHD-A2T plug to the USB passthrough of my keyboard (Asus Strix Flare); infinite restarting screen until I, once again, unplug the hard drive. I tested with all my external hard drives arround, and the EHD-A2T is the only one doing that probably cause it's the only one supporting Aura...