Black Hole
May contain traces of nut
Then the Humax is likely struggling with the interface to that particular drive. It could be at the USB level with the USB3 to USB2 fall-back mode, or it could be at the drive format level trying to cope with a 2TB NTFS drive. You could try the custom firmware ntfs-3g driver, it might improve things (or might not).
Once you find a file to play, does it play without difficulty? What type of file?
Once you find a file to play, does it play without difficulty? What type of file?