I am looking for software suggestions for regularly generating off-computer discreete backups of large collections of music rapidly and accurately. I have ytaditionally maintained 3 independent 5 Tb hard drives backing up a collection of FLAC files and folders amounting to near 10,000 albums. I have been using Free File Sync, but this software is changing management rapidly and I fear that problems may exist with this in the near future.

What software do you use to keep and to protect Your Flac file music collections on remote hard drives?

Thanks,

Tom