Are these fusion drives in the new iMac really that bad? Everyone on here really has me apprehensive about buying an iMac with them. I really feel like it's my only option. I have a large photo/video/and music library which is around 1tb. I've tried moving my photos on to an external to make room on my existing iMac but it wouldn't move the library as it said some files couldn't be read. I'd really rather not us an external except for backups. I was planning on buying a 3tb fusion drive but it seems most people on here recommend getting an SSD and using an external.