HS-DHGL USB drives not working

[zwilnik]

I have 2 500gig and 1 250gig NAS drives. If I connect USB drives (1 250gig 2 500gig 1 1000gig)  to 1 of the 500's all work fine (formated XFS). If I connect the drives to the other 2 NAS's (only tried the 250 and 1000 drives) then they become read only and depending on which port (ie usbdisk1 or 2) they are connected to, a tree of 27 sub-folders appear with the port name.

 

I have tried formating the USB's with all the NAS's, flashed the firmware so that they are all 2.1, factory reset the 2 troublesome drives and compared the settings between drives. All the USB drives were working as backup drives off a computer and the 1000gig drive is only about 3 months old and only been on when needed for backup. 

 

Any ideas?

[Jotin]

Have you tried formating the drives with the units that are having the issues or was it only formated with the one that worked? 

[zwilnik]

I've tried formating the drives several times with all the NAS's, good and bad. The best I've had, is for the USB drives to work for a couple of minutes before going bad, except when connected to 1 of the 500's

[Jotin]

When you say you factory reset them, what do you mean? What process did you do? 

[zwilnik]

Put the drives back to default and set the drives up from scratch.