Hourly backups to a NAS and one of two local USB3 SSD drives that I rotate weekly.
You can get around 400 MBps write rate on the latter [1], which is pretty decent by itself, but I also use bvckup2 that does block-level delta updates and that cuts down backup time to around 10 minutes. That's on a bit less than 1TB of data mostly comprising very large encrypted file containers and VMs. Worked pretty well so far, went through a couple of restores just fine, so no complaints.