DB ALU3 HD not seen by Windows 10

    DB ALU3 HD not seen by Windows 10

    Hello, I have recently bought a DB ALU3 and installed a 500GB Seagate Barracuda 7200.11 in it.
    The device is seen by Device Manager as "ASMT 2115 USB Device", but I cannot perform any action on it. The disk is seen in Disk Management but it states "not connected" and hence no action can be performed on it. I have tried to de-install and reinstall it but no progress.
    I can hear the disk spinning as I power up the device.

    I have tried on three different PCs, an ASUS desktop (windows 10), an HP notebook (windows 10), an ASUS notebook (windows 7). Same issue on all three.
    Please tell me what I should do, I do urgently need the HD to work.