I have a 2011 iMac that is completely filled up on storage, I have a lot of music and photo's. I've considered upgrading to the new iMac but after reading a few posts on here, it seems people are still recommending going with the SSD drives and then using an external. Something just seems wrong to me about buying a computer and then still having to have an external. I've only used an external for back up in the past. How does it work, you obviously have to have the external on all the time, does that wear it out quick? If I have my music and pictures on an external is there a huge delay to load it? Is that really the best option?