When I connect the external HD to my laptop it opens/works perfectly, all files are available (AVI, MP4, MKV etc). When I connect the drive to the WD Media player it states “Unrecognisable USB Device” and won’t load my files. I have tried re-setting to factory settings and this has done nothing. W…

AFAIK that model does not support 3TB units Try a lesser capacity drive, think is up to 2TB