Very important, and often overlooked advice. Raid is not a backup!
@boondocks - I’m a music junky but in no way is my collection as big as yours. 30TB is a huge amount of music

. You ever try plex?
Actually my ripped surround music collection, is now (just checked) is north of 34TB. That is primarily .iso files. Does not include ripped or hi rez stereo files. I also have several 6 ft tall disc racks, and several smaller ones. Somewhere north of 2000 discs.
I'm 74 years old and have been collecting surround music, and building my own pc's for many years.
I don't do plex. My playback/storage device is the pc, although I own 3 Oppo's (one is jailbroke), a Sony (spare for ripping SACD) and an old Samsung.
I use PowerDVD Ultra for most playback, JRiver for some. Foobar for DVDA/SACD playback although JRiver will play SACD .iso.
I have an Atmos 5.1.4 setup with an Onkyo TX-RZ50 and a second AVR running the 4 top speakers. (I did have 7.1.4 but that's another story)
To address some other questions (cram it all in here, lol)
My current backup strategy is to have identical folders on multiple drives, (with Quick Access listings in the File Manager) and a second pc with a copy of everything. So I'm manually copying to multiple folders and a second pc. (I could automate this somewhat of course, but I would rather mirror some of the drives and go RAID 0)
I also have a collection of surround BD's on smaller drives archived, boxed up and sitting in a cabinet in the pc/audio room.
I have a CaseLabs Merlin case with 2 pedestals. The top pedestal has a mount for three HDD cages, each cage holds 4 drives. Plus I have mounted a few SSD's there as well. I have an NVMe drive on the mobo for boot/C: drive. The only SATA mobo port I use is for a BD burner/ripper.
All HDD drives are SATA NAS or Enterprise drives. Current capacity on the main rig is about 150TB.
I of course have more than just music in storage, and duplicated as well.
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Just really puzzled why neither MSM or LSA is working for me as they should. Can't log in to MSM and LSA gives me no options other than one to upgrade firmware (card is running the latest firmware).
Sorry for long post.