Sufentenil (you must be an anesthesiologist),
"I use Backblaze's various service for my home computers. I use their unlimited data services (which is about $90/yr for a 2-year plan, or under $8/month). This is what you likely want for your situation. It works fine, and with a check of a box in the settings app you can choose any external hard drives to back up."
I have this very BB service and I check the box to include my HDD in the backup, but it doesn't back it up and their website states this:
"Network Drives and NAS
Network-mounted drives, network-attached storage (NAS) devices, remotely mounted computers or volumes, and shared volumes are currently excluded from Backblaze Computer Backup. However, you can back up network drives using Backblaze B2 Cloud Storage."
Is an HDD included in the above exclusions? This I need to figure out because in spite of checking all the boxes, it doesn't back up my HDD. (Their customer service is among the worst I have encountered!) What it does backup it does at snail's pace... it took weeks to back up a mere 500 GB on my Mac mini and at that pace it would take an eternity to back up my 8 TB of music on my HDD!
Other issues thoughtfully addressed. I agree that most music that one has in their collection of CD's is available on the myriad streaming services and I am happy with Tidal Hifi. But, carefully curated CD's that one owns might be want to be backed up for play via Roon, etc. Some years ago, I ripped all my CD's to my HDD and play everything back via my computer via Roon and a DAC for playback. My 2100 SACD recordings are not available at that level of density on any streaming services.
Another other issue is local storage and I note conflicting points of view if an external HDD or SDD is preferred. I was surprised to find that SSD's might not be as robust I assumed. I have several Seagate et. al. HDD's that failed... I just expect them to fail. I already have my music files backed on two HDD's, but seldom turn them on which seems necessary for their vitality.
I will see if I can figure out how to get BB to backup my HDD and will report back and will hold off on purchasing a SSD. Thanks for all your input.

