I had the Western Digital Elements SE 1TB Portable External Hard Drive to connect receiver to my TV Kathrein UFS ordered me to bad experience with a Toshiba STOR.E Basics 500GB external hard drive 913. And indeed, everything works right away, even from standby drives the plate fast enough high in order to save the recording can, and no Y-cable.
Otherwise: fixed plate, very quiet, but very bright flashing light during operation. I have put them behind the receiver, then do not mind.