Unfortunately, directory monitoring doesn’t work if your music is on an NFS share.

You go into the LXC’s console and type update, or use whatever package manager is available in the LXC.

According to the article, headphones using a Bluetooth SoC manufactured by Airoha may be vulnerable. So, need to find if your headphones use their SoC.

An extra hard drive doesn’t save you from something like your house burning down. Off-site backups are important!