You wanted to increase the VirtualBox, .vdi disk size but encountered with below error,
VBoxManage.exe modifyhd "C:\VirtualBox VMs\ITsiti.com\Oracle.vdi" --resize 1000 0%... Progress state: VBOX_E_NOT_SUPPORTED VBoxManage.exe: error: Resize hard disk operation for this format is not implemented yet!
• You need to make sure that your storage type is Dynamically allocated storage. The command can only be works with this type of storage. Refer to this article (method 2) if you want resize the VDI for fixed storage type.
• The –resize xxxx is the total number of your current VDI size plus the incremental size. Example, if your current VDI size is 10GB and you want to add another 5GB, so the size will be 15GB. You will be getting the above error if you are entering the new size which is lower than current size.