Hello,
I have a little problem. I can’t find my HDD pluged in my RPi whereas I can my find another HDD plug in my residential gateway (so OSMC accesses it through network).
Is the drive powered via USB, or self powered. I’m betting it’s USB powered and that your Pis power supply isn’t sufficient. Try a better power supply.
Might not be true for all, but when I tried an USB powered disk I still had to add ‘max_usb_current=1’ to config.txt even though I used a powered hub.
I guess the disk politely asked the Pi for power instead of the hub?