Lxc containers backup

Hi all,

I have some pritty big containers 500gb+ wat is the fastest and best way to backup all containers and import them to an other storage backend? Lxc export is slow

lxc move --storage blah can be used for this without requiring an export.
It still will need to read and write the entirety of the data, but at least no tarball copy is involved.

So if i do lxc move —storage to external hdd. Then reinstall my system.

How can i move all back to normal storage?

And do i need to do anything else?

I see

I create a new storage pool on for example an usb drive the i run the command to move the containers. After i reinstalled my system i can do the same except now to the default storage pool. Is this correct?

Ps can i do this on a running container?