I second this. It costs about $50 for a license but they support incremental backups up to any of a NAS, s3, s3 glacier, various tiers of google cloud storage,

I second this. It costs about $50 for a license but they support incremental backups up to any of a NAS, s3, s3 glacier, various tiers of google cloud storage, dropbox, and google drive. Client-side encryption is built in. It's good software.