iPad help - can’t see external drive

I have an iPad, not a pro, and the appropriate apple adapter. I’m not able to see the external drive. I understand the drive needs to be reformatted for the iPad but I don’t know where to go for that. I’m not prompted when the drive is connected either. The drive is powered up because I can hear/feel the drive moving.

WD external drives are not design for ipad/ipod product. If people to able to get it working that great…but battery will drain fast…