I have a pair of (different) 8TB drives in the mirror: one Seagate, one Western Digital, both NAS-oriented models. The offsite drives are both Seagate 16TB. As

I have a pair of (different) 8TB drives in the mirror: one Seagate, one Western Digital, both NAS-oriented models. The offsite drives are both Seagate 16TB. As the content on the live mirror changes they slowly fill up with snapshots. I’m getting close to needing new drives, but I haven’t decided what to buy yet. The mirror has about 1TB left. I’ll probably change it to 16TB, and the backups to 24 or maybe 28? Not cheap though.