How to hard drive partitioning

storage.jpg
 
That looks fine, can you show a screenshot of the VM create wizard where it don’t show the storage on the drop down?
 
If skip this step I can choose size of disk and local-vm shows.

How download my iso to local storage?
Do I need choose type "cache" for OS (Linux - CentOS, Windows Server 2012)?
 
If skip this step I can choose size of disk and local-vm shows.

How download my iso to local storage?
Do I need choose type "cache" for OS (Linux - CentOS, Windows Server 2012)?

You can wget the ISO to the template/iso folder in /var/lib/vz

Cache is up to you if you want to leave none or write back. Either will work.