[RKDinOKC]

One of my external backup drives is an IoSafe fireproof waterproof drive.

I use Macs and keep 4 backups. One Time Machine (for opps I didn't mean to delete that, updates houriy in the background). Also backup the time machine backup to a partition on the fireproof drive. Also do a bootable full backup that runs nightly and a second bootable full backup to a partition on the fireproof drive once a month. If I accidentally deleted a file, it's on time machine. If time machine becomes corrupted or drive dies can switch to time machine backup or copy time machine backup to a new drive. If my main drive fails I can just boot off the backup drive. If there is a fire I can boot or migrate a new computer off the fireproof backup.

Just think about if you need to restore from that online backup. It would either take as long to restore as it did to backup, or would take time to have them copy your backup to a drive and ship it to you. Same for the time machine backup (which is a little faster because it should be over your local network and not the internet) but still takes a very long time to do a complete restore from a time machine backup. With a local hard drive doing a bootable full backup, you can just plug it directly into your compluter, boot off it and you are going again.

I run a server that I host web and email on for several companies. That server also has the two big external drives attached, one fireproof. Each drive is partitioned for time machine and bootable backups of the server itself and for the bootable and time machine backups of my computer. The server hosts the backups for my computer as a file server and manages making the montly backups of all backups to the fireproof drive partitions.

I also have another partition on each backup drive. The email server backs up nightly to one keeping a 14 day rotation, and monthly to the fireproof drive.

One of my clients wanted their email files to have an off site backup. I have lunch with one of them weekly and he brings a portable drive at lunch once a month. I copy an email backup to it and give it back the next week. He copies it to their local file server. We thought that was better than doing any sort of long drawn out copy of the backup over the network. Takes about 30 to 45 minutes to copy the backup to the portable drive plugged directly into the server.