Not sure where to ask this question but here goes.... I've got a 2013 27" iMac which has a 4 TB hard drive in it, which is the size I need. I'd like to buy a new iMac but Apple says they won't install a 4 TB drive in it. The biggest drive they offer is a 3 TB Fusion Drive but I'd like a simple HDD that's 4 TB in size. Question: Is there any technical reason why an authorized Apple service provider couldn't install a 4 TB HDD into a new iMac to replace the 1 TB HDD that normally comes with a new iMac?