Changing Library Paths?

I'm wondering if there's an easy way to change multiple library paths at once or if I have to go and click edit source on every single individual show in the files section. Originally I had two 1 terabyte drives and my library was separated on those. I now have it moved onto a two terabyte drive, and at first that was fine, I just made two separate partitions on the drive and moved things over. Recently a show that I have on the full partition of the drive released more episodes, and I have no more space to get them unless I move them over to the full part of the drive and change the letter path for that show, and I realized it would be much easier for me if I could just have everything on one partition. If I have to I will change every individual path using edit source, but I'm just trying to figure out if there's an easier way before I spend an hour or two of my time doing it the hard way lol