My wd external hard drive, turns on when connected

it is likely that your hard drive is broken internally. th noise you are hearing is the needle hitting the platter inside the drive itself, something that normally should never happen. there are a few possible quick fixes, but nothing permanent other than replacement. you can leave the drive until it is cool then try. also some people have said putting it in the freezer in a ziplock bag for 15minutes will work, as moisture can damage the drive as well i do not recommend it