albertporter,
with my experience, if I were you, I would do what I already did. I waved the white flag, bought 512 GB SD card (that is how I know it works despite instructions saying it is only up to, if I remember correctly, 64GB), and bought dBpoweramp program to transfer whatever to whatever. Basically, I converted all the AIFFs to FLACs and put it on that SD card. Then the card went to the slot, conveniently out of sight and out of way, and it is all there. There is still some space left on the card, but not much. As AIFF it was not even close to 12 TB so you may not be too happy, but it fits some thousand or more albums. Granted, those are albums and not 80-minute CDs so some are barely 30 minutes, but most are 1960s-1970s-1980s so think more like 45 minutes. The downside of dBpoweramp is that, for all I know, it does not convert DSD, if that is what you need, but I have heard that it is the best one to transfer album art without glitches. I would have to agree, although I was surprised that some things I did have to smoothen out to make it all really perfect. That is another topic and feel free to ask if you ever go down that route. I, eventually, settled for Volkswagen and this sound system convenience was one of the three or four important factors. It is just that I am now looking for a new car because I cannot stand the sound. I mean, I am not trying to be snobbish or pretend that my ears are descedants from some royal dynasty, but it hurts. I was hoping that new (2018) batch of VWs along with the new screen accidentaly got something in amplifier changed. I went to the dealership last weekend and I believe it might have happened, but will check a few more times before I give money away. I feel your pain with having to juggle needs/wants of the car as a vehicle and some decent sound system that would play what you would expect it to play in 2017-2018. I end up with VW because I do fit in it comfortably (6'3"), they do come with manual transmissions, if you pick carefully, and they still have some sort of spare tire or at least space to put a temporary one without taking away the whole trunk.
I think that sound system quality is sort of an afterthought in most cars. They simply do not expect a driver with an iPhone to connect any other way but Bluetooth or care about files it can play. In fact, the young man who was showing me Tesla (Model S, I went just for curiosity and completness sake) was surprised with my discovery of "only Bluetooth from your phone". It turns out that he, the person representing allegedly very technologically advanced company, had never thought of any other way but Bluetooth, nor had anyone who ever walked in that store in over a year that he had been there. However, in his sales pitch he did talk about wonderful sound system with so many speakers and Watts, and what not. Accept it, we are a minority that is easier to ignore than to do small tweaks for.