changing default download location for itunes content

hi i have two drives on my pc my 118gb ssd 'c drive'(used mainly for running the pc) and a 1.82Tb hdd 'd drive' used for storing all my pic vids game etc i installed itunes to my d drive but all content by default downloads to C:\Users\Owner\Music\iTunes\iTunes Media then either movies, music or tv programmes and i have to transfer it to the d drive( D:\Itunes\iTunes Media) then tv programmes/music/movie is there a way to change it so it automatically goes into the relevant folder on the d drive and i don't have to waste time copying from the c drive and the deleting it?