I had the short HRK 7560 in operation, with an external hard drive formatted in NTFS 64KB block size. The recordings including subsequent playback worked perfectly.
The hard drive is a Toshiba Stor.E Basic 500 GB USB 3.0.
The relevant information for the formatting I of the Xoro Forum. But I have now bought the 9200 because of the twin tuner and since the recording works, the hard disk but is no longer detected after the completion of recording by the receiver. The recording is on the hard drive above - I've checked on the PC, but the hard drive appears on the receiver as "unmounted" with filesystem "unknown" on.
With a hard disk to NTFS and default block size I do not have this behavior of the receiver.
This mistake I could reproduce the way with a USB 3.0 flash drive.
Supplement: I currently have the 3 receiver (thanks to Amazon) in use, the problem is still present.
All I can say, if the receiver does not switch off after the programmed recording, I can use the recording from the hard disk / USB Stick (64 KB cluster size) play.
Only if I commit in the programming that the receiver should go to stand-by, then the hard disk / USB flash drive is no longer recognized. It seems the receiver turns off too quickly, thus can not be completed correctly recording.