Ideal for my use 1

I took two: one connected to the PC and connected to the box.
This way, once dematerialized copied music from my PC, I press the ON / OFF button, ejects the DD, DD inserts on the case of the box, on and that's it. I have the music accessible from the box!
In the opposite direction, just insert the HDD in the PC box side, to light and that is good: the content appears warm (as is the case when inserting a USB stick).
Less high tech and secure a NAS (no possible RAID) but much cheaper too.