Where is Vagrant saving changes to the VM?

Question

I am just starting with Vagrant and I am having a little trouble understanding a few details. I have read through the docs but still am missing a basic concept. When I want

Answer 1

I always change the directory that Virtualbox uses by default for VMs. Normally it is in your profile folder in Windows.

I change it to something like "D:\VHDs\VBox\" and there I found my vagrant test vm: "test01_1347456065". It was called test01, so I guess vagrant adds the numbers to keep things unique.