Probably just as well then that I have mirrored Synology SANs in two buildings 100mtrs apart - my office/workshop and the comms rack in the main house, both protected by online UPS plus several TB of Google Cloud storage as tertiary backup (our uplink is slow as we don't have fibre here yet). There's a UniFi 1.7Gbps Building-to-Building bridge between the house and office, so that's fast enough (the whole network here, including all the APs, is UniFi).
TBH, either or both of the SANs could serve up the music - the LMS server is a bit redundant in that aspect, except it talks to the client nodes (mostly RPi 3Bs running Max2Play with IQaudIO hats, but that will change in the next few months). The server does have Spotify &YouTube etc connectors and does also serve up internet radio, so that's useful - my wife is a polyglot (7 languages, including modern Greek and Arabic) and uses many foreign stations to "keep her ear in" for those languages. Greek radio is awful; Arabic likewise.
Oh, and periodically I take an image onto a portable SSD of the LMS server - not often as it doesn't change that much as most new music is via online streaming services.
Mind you, backing up the vinyl is more tricky. Some of those LPs would be difficult to replace.
Yes, I know this is not a normal setup, but just periodically putting a decent sized USB stick into the server and backing up to that is enough for most folk. It doesn't have to be rocket science.