Hi all,   It is possible to get the DS412+ to boot from an external USB drive, I have done this successfully with an A-DATA C802. Normally the NAS will not boot any old USB you connect to it, regardless of whether the drive is in the front USB port or the back. It turns out the BIOS is locked to only boot a certain VID/PID (F400 for both) so even if you clone the internal USB to an external drive it will not boot.   This has been a problem for me.. until now!