So, I thought I was being smart, but I made a stupid mistake... I backed up my entire iTunes library, and then I deleted the files from my laptop, since I can just stream them if I want to play them. Awesome, right? I saved 120GB of space on my computer! However, I forgot that I have an iPod Classic that I want to sync, and (as far as I can tell), that only works if the files are physically on the disk. I figured no problem, I'll just copy the files back in and all should be good. Unfortunately, it doesn't work. iTunes still thinks the files need to be downloaded. I can't figure out any way to get it to re-scan the folder and realize that the files are already here. I tried "add files" but that actually makes a second copy. I REALLY don't want to have to download 100+GB of music over my internet connection when I already have multiple copies of those files sitting right here... What is the trick to getting iTunes to recognize the files that are in the media folder?