I was over on the Ioniq5 forum and found this thread. There may be hope for me! The english in the post is a little bit confusing, but you will get the idea.
USB 8000 song limit "work around" (not sure how to do the posting quote thing, so here is his post copied and pasted:
"When connecting a USB drive, the limit off songs are 8000, and for some of us that is too little.
I have a harddrive connected with about 22 to 25000 songs on them, and have found a "work around" to access them all.
It's not easy to use, but do work.
When going via file system, or artist I only get artist/folders that ut to H in the alfabet.
When going inn via song, and put on random, it will get to songs from artist further down the alfabet. If I want to listen to lets say Metallica which I can't acess normally, I can skip in random untill I get to one of their songs, then press list, and through that way get into the folders with their music and then choose which ever album I like.
Should have been better if Hyundai had bigger memory to keep songs in.
And for me it's only for a short while. Getting two drives, and splitting them about even in the alfabet.
Had it that way in my eGolf on two SD cards, but could switch between them there, and not plug in and out.
The I5 do remember where I was when using another USB music library, when I connect the harddrive again."
This is on a Hyundia Ioniq 5, so fingers crossed, I hope this will work on the EV6 Meridian system. The lister was from, I think Denmark, guessing by the flag, and he was also mentioning that he was going to split his song collection between two hard drive's (which I think he means USB drives) and switching between them. I don't think this is an option for US cars as there are several threads here stating that using a USB splitter or switched USB hub is not recognized by the system. I am going to further explore that when I get my car by trying several USB hubs to see if I can find one that will work. Fingers crossed! If anybody reads this and wants to try this out - USB drive with more than 8k files, played in random mode (songs) - to see if the Kia will skip to files outside of the first 8k - to confirm or disprove - then report back to this thread - that would be greatly appreciated!