I use Backblaze. But it’s a chore to get started the first backup. I also backup to a small USB disk and keep that in a safe deposit box at my bank.
If you think that, you clearly haven’t read everything I’ve written. 
If you have access to a Mac or Linux box, check out rsync… very handy tool for what you are asking. You can use it to keep different disks ‘in sync’. It’s what I use to replicate my new music files from a source disk to several backup disks.
lol that’s self-effacement not evident in your posts but I like it!
I have a Roon Nucleus but w/o hard drive. I have two G-Drives one for database and one containing all of the music files. When I used to use a Meridian Sooloos I just backed up the entire library to a hard drive and stored it elsewhere. I want to do that again with this much bigger library. Not being a computer savvy guy I originally figured I’d just connect to my computer the new drive I just bought (properly formatted to Fat32) and drag the entire library to it from the G drive. Sounds so simple but based on what I’m reading that’s somehow not a good idea and I don’t want to do anything to screw up what I have…
IS the hard drive attached to the nucleus formatted as Fat32? or does it get formatted as an EXT filesystem like the NUC internal ones? That could make it harder for you to access your music if it’s got a linuxy format.
also can you see the drive on your network? How do you add music? is it by remotely mounting that drive on another machine and copying music to it? If that is the case, you could remotely mount the drive like you were copying music to it, and copy the music off of it.
Sheldon
Sheldon beat me to it, His explanation is correct. You most definitely do not want to do a direct copy of the database, but there is no reason to be worried about directly copying your actual music files to any portable drive that you want to disconnect and store offsite.
Are you the real Michael Fremer of analogue vinyl infamy here on a digital product forum? … 
H
See this is the problem with audio, I’ve tried your Ethernet Bartok combination and I’ve tried usb into Chord Dave amongst other combinations. In a proper listening room on speakers and headphones. They were both excellent just different. It’s crazy, after a certain price point the audio is just different NOT “better”. and those differences are subjective.
H
I own a dCS Vivaldi and ROON Nucleus. Yes it’s me but no “infamy”. I still prefer vinyl records. They still sound better to me. When people react as you did I explain that my wife shows dogs. One of the judge’s obligations is to check male dogs for properly descended testicles. He checks every male dog. Am I surprised that he doesn’t walk around on the street inspecting the balls of every dog he sees? No. So my point is that while I concentrate on analog and vinyl I still have a good digital rig and enjoy listening to it. I still think the CD was the worst format every invented for every reason and I’m happy it’s going to go away. Had today’s hi-res been the first digital format I probably wouldn’t have gone on an anti-CD rampage. My issue was simply that every CD I listened to back then sounded awful especially reissues that were always better on original vinyl, yet people were declaring how great bad sound was. That’s what incensed me! I won as far as I’m concerned. Now we have the best of both worlds…
There’s a few eggs in that basket. Strictly speaking CD isn’t an audio format, it’s a storage medium. CDDA/Red Book bundles some carrier conventions but the underlying encoding format, 2 channel PCM at 44.1/16 bit, isn’t likely to be going anywhere anytime soon…
[moderated] CD is a FORMAT as is the LP as is the cassette. 16 bit/44.1K will be a relic
I’m just an engineer who works in a field where these distinctions matter, clarification on a factual matter isn’t lecturing.
There’s a distinction worth making between these storage formats. Talking about formats without a qualifier is usually meaningless. A format’s just a conventional arrangement at its loosest definition. If you don’t say what you’re arranging you’re been ambiguous at best, misleading at worst. File format is used to describe arrangements/structures of digital data on storage media. So here’s the distinction. For LPs and cassettes the audio encoding is basically inseparable from the media. There is no LP format without records. For CDs the demise of the storage format doesn’t affect the prospects of the encoding format. FLAC and WAV on any storage media will do nicely.
Wow. Good night.
Michael I love vinyl and have read your brilliant articles for a while! Great to see you here! Cheers
H
I am a software engineer, hardware engineer and audio engineer. I can tell you that what Alfredo says is correct.
Old School (I assume) HiFi Audio people seem to still think it’s like the days when you had RCA cables made of gold and stuff. It’s not like that any more, it really isn’t. If there WAS anything problematic in this space that somehow slipped through, you wouldn’t hear it anyway.
There are people declaring how great MP3 sound is, so really it’s not surprising 
I have tried both.
My core was an older clone i7 and used an i5 based clone connected to my Bryston BDA-3 2018 firmware. Both have Power Supplies that have much lower than average noise. While testing both were connected to same 24 port managed switch. Now that switch doesn’t have POE but there are two on network. Switches are joined by fiber.
I find better micros detail, sound stage, accuracy connected directly to the core. (I then wind up using the i5 which is newer, better quality motherboard).
Sure others experience will differ such is the nature of different equipment used to reach same goal. Personally like to read to learn, then listen to which I like better.
Cheers
Stay safe
And, like Alfredo, you are missing the point. It really isn’t that simple.
This thread may once and for all determine how many times one can, in fact, beat a dead horse.
The desire of so many on the Roon forums to prove to each other that the other person is wrong for the most esoteric reasons is amazing. I thought it was bad on automobile forum or political forums, but the folks on Roon forums just seem to revel in their need to prove they are right and prove that anyone who doesn’t agree with them is not just wrong, but incredibly wrong.
What a freaking waste of energy.
Can we please close THIS thread. The OP’s question was answered a long time ago and the rest of this sure seems like a bunch of egos fighting over…well, I don’t even know at this point.
Unbelievable. With all the crap going on in the world, THIS is what you want to argue about? Really?
Luckily, I have a choice to not come back to this thread, and it will be a pleasure to exercise that choice. Changing channel now…click.