"The window will show a localhost instance of Qemu; this is
where you will create your new virtual machine. Before beginning,
select the localhost instance and use the Edit menu item, and then
select Host Details. This is where you configure virt-manager.
"The most important of Host Details is in the Storage tab, as it
specifies where virtual images will be saved. By default this is
/var/lib/libvirt/images/ which may or may not be a good choice
depending on the size of your root (/) or /var partition. Here, /
has 5GB free, which only allows for a maximum image size of 5GB,
and then leaves nothing for the system, whereas /srv has 32GB free
— a much better choice.
"Create a new storage pool and point it to any location you
prefer. This can be a directory, partition, iSCSI target, or other
remote location. If you do not want to use the predefined default,
simply deactivate it after you have created a new storage