


Open windows terminal: $ VBoxManage clonehd -format VDI "path_of_wmdk_file" "path_of_vdi_file"

Observe disk format of the virtualbox file, if it is not *.vdi, convert disk format from *.wmdk to *.vdi. The detailed steps are below (tested with "Virtual Machine CentOS 6.4" and "VirtualBox 4.2.18") Add created disk space to Linux FileSystem.Modify the filesystem to allocate free space for your drive with GParted.Resize the disk to create free space with VBoxManage Tool.Clone your VMDK to VDI format with VBoxManage Tool.
