No files will play on clients.

[damnsignin]

Sorry for the delay. stupid DST nonsense messed up my sleep.

I set up a fresh boot card with Pi OS lite 64-bit and I used the video guide I posted at the beginning to redo everything, but I skipped all the CasaOS stuff and just set up the mounting data again, using the previous partition label data to mount the drives to fstab. These are the steps I followed (mostly) to get to where I am now.

Code:

#config.txt
[all]
arm_freq=2800
gpu_freq=700
over_voltage=3

SSH
sudo su - to Become a Root User
sudo nano /etc/ssh/sshd_config
ClientAliveInterval 1000000
ClientAliveCountMax 3
sudo systemctl reload ssh
sudo apt update && sudo apt upgrade
sudo -s
fdisk -l
lsblk
blkid
nano /etc/fstab

#fstab edits
LABEL="NAS_A" /DATA/Media/NAS_A ext4 defaults, rw, nofail 0 0
LABEL="NAS_B" /DATA/Media/NAS_B ext4 defaults, rw, nofail 0 0
LABEL="NAS_C" /DATA/Media/NAS_C ext4 defaults, rw, nofail 0 0

mkdir /DATA/
mkdir /DATA/Media/
mkdir /DATA/Media/NAS_A
chmod 777 /DATA/Media/NAS_A
mount LABEL="NAS_A" /DATA/Media/NAS_A
mkdir /DATA/Media/NAS_B
chmod 777 /DATA/Media/NAS_B
mount LABEL="NAS_B" /DATA/Media/NAS_B
mkdir /DATA/Media/NAS_C
chmod 777 /DATA/Media/NAS_C
mount LABEL="NAS_C" /DATA/Media/NAS_C

cd /DATA/Media/NAS_A
sudo chmod -R 777 *
cd /DATA/Media/NAS_B
sudo chmod -R 777 *
cd /DATA/Media/NAS_C
sudo chmod -R 777 *

cd

I think I have all the basics set up, without anything GUI-based added, like CasaOS or Jellyfin.

Edit: Forgot, I also added the RTC battery code to config.txt if that matters (doubt it?) dtparam=rtc_bbat_vchg=3000000