When I connect via USB a My Book Duo (with two NTFS-disks in JBOD mode) to the EX4 - I see message “Unsupported file system” on LCD screen of EX4.
Similarly problem I have with USB-connection this My Book Duo (with two NTFS-disks in JBOD mode) to the WDTV of last generation. However in this case WDTV see My Book Duo, but just with only one disk of two.
When I connection this My Book Duo in RAID disk-mode to the EX4 or WDTV - I not have any problems.
WD - Why??? What’s wrong with your products with JBOD mode???
Any firmwares in my WD-devices is last version.