Failed to create virtual disk to store data, error = 0x70
When trying to migrate to Windows Azure.
The error (0x70) means you've got not enough space to keep the intermediate image.
Unfortunately, Azure migration requires more space for an image than Cloudscraper estimates.
Extend your storage space for intermediate image to the full size of volume you are going to transfer.
You could expand storage locally either by adding a new hard drive or connecting a network drive.