Adding secondary hard drive

Hello,

I just add a secondary hard drive , located at /dev/sdb, how can I move all my containers to /dev/sdb so if I add or delete container it uses that drive. I am using google compute and hard drive space is 40GB

Thanks

You can add a storage pool on that disk with something like lxc storage create new-pool zfs source=/dev/sdb and then use lxc move NAME --storage new-pool to move the instances.