So I have an iPhone 4, an iMac, and the latest version of iTunes. I moved my iTunes folder from my 1 tb internal hard drive to a 2 tb external hd. When I added everything back to my iTunes, everything went well expect my apps.......when it tries to add the apps I get this error message: the app "app name here" could not be added to your iTunes library because an error occurred. An unknown error occurred (-50)". This happens WITH EVERY APP. anyone know how to fix this because I really don't feel like downloading all my apps for my iPhone and iPad again. And yes, I tried transferring purchases from the phone to iTunes, it didn't even give me a quarter of my apps. any help is greatly appreciated and if I posted this in the wrong forum I apologize in advance.