Music Will Not Sync
Yesterday I got a new iPhone 6 and upon cloud downloading all of my data from my iPhone 4, everything was fine, but none of my music transferred. I was able to find some of my music through purchased, but not everything I have I bought from iTunes - some of it was transferred from CDs, so purchased on older/different Apple IDs.
When I plug in my phone to my laptop and try to transfer music to it through iTunes, it shows up as not letting me put the album onto my phone. I tried to sync multiple times, and then at one point it said it was syncing everything I'd tried to transfer, so I thought it was working, but still nothing had gone to my phone. How can I fix this? I've been using Apple products for 4+ years and have only been having this problem recently.
iPhone 6, iOS 8.3