How to move/shrink \Music\iTunes\Mobile Applications

[anon(4742831)]

I've noticed that my \Music\iTunes\Mobile Applications folder is 10 gig on my C drive. I installed ITUNES to my D drive, so not sure why it is putting stuff on my C drive. I am limited space. Any ideas why itunes does this, and if I can move the folder location? Also, what is this folder for? I thought all my itune apps are stored in the main itunes directory.