If your NAS is small enough, you could get a couple of external drives and rotate them.
I've got a QNAP 4-drive NAS and the stuff I want to keep backed up fits in under 2TB. Based on that, I've got a 2TB external drive and have set up a backup job to sync the stuff I want to keep to that drive every morning.
There's no reason you can't get two drives and swap them every week. Just set your backup job to run weekly and unmount/eject the target drive when complete. Every Monday you just grab your drive and take it to work, and every Friday you bring the old drive home and plug it in.
Of course, any backup that requires manual work is likely to get neglected eventually. "Oh, I haven't done much work in the last week, I don't need to take the drive to work today" is something I've told myself all too often when it comes to my Mac backups.
Automated is better. If you have a second NAS at a remote site, you should be able to use ZFS send/receive to update a remote NAS over the internet.
I've got a QNAP 4-drive NAS and the stuff I want to keep backed up fits in under 2TB. Based on that, I've got a 2TB external drive and have set up a backup job to sync the stuff I want to keep to that drive every morning.
There's no reason you can't get two drives and swap them every week. Just set your backup job to run weekly and unmount/eject the target drive when complete. Every Monday you just grab your drive and take it to work, and every Friday you bring the old drive home and plug it in.
Of course, any backup that requires manual work is likely to get neglected eventually. "Oh, I haven't done much work in the last week, I don't need to take the drive to work today" is something I've told myself all too often when it comes to my Mac backups.
Automated is better. If you have a second NAS at a remote site, you should be able to use ZFS send/receive to update a remote NAS over the internet.