qcow2 and vmdk -> thin provisioning

[informant]

hi, why do qcow2 and vmdk not use thin provisioning?
regards

 

[tom]

why do you think so?

 

[informant]

hi, i have create a 2 qcow2 hdds (á 1TB) and 2 vmdk (á 1TB), after create i migrate to a other server and transfer does transfer 1 tb hdds from 1st to new server as full size... or? why transfer show 300 gb of 1TB transfer... 31%...
regards