Where is k3s storing pods?

Hello all,
I can’t find information about where the pods that run on nodes are stored… I know its temporary file but what if I want them to be created on specific storage or mount point ?

From df -h on one node I can see it mounts:

shm 64M 0 64M 0% /run/k3s/containerd/io.containerd.grpc.v1.cri/sandboxes/a9d11117b319432fff833cda48e5dc16f88bcc28b8e8148077d607ddaf41dfab/shm
overlay 15G 1.9G 12G 14% /run/k3s/containerd/io.containerd.runtime.v1.linux/k8s.io/a9d11117b319432fff833cda48e5dc16f88bcc28b8e8148077d607ddaf41dfab/rootfs
overlay 15G 1.9G 12G 14% /run/k3s/containerd/io.containerd.runtime.v1.linux/k8s.io/ab8b17764bed69e2702565fa171fcc84defcab1de7093bd68f53581732ef39fb/rootfs
overlay 15G 1.9G 12G 14% /run/k3s/containerd/io.containerd.runtime.v1.linux/k8s.io/dc246f55de330a4a0d23da56bf7212008e49fe974302c664b930869544a58051/rootfs
tmpfs 396M 0 396M 0% /run/user/1000

But where is the setting what root folder it use for that mount… what I want to do is specify for example /cluster_tmp to be the main root for the cluster pods that are deployed on node…

I’m running rpi cluster and would like to use usb3 disk for the storage not the sd card, to lighten the read/writes to the card…

Nobody knows ? clearly it uses /run/k3s but how to tell it to use some other volume/mount point ?