Adding more space to virtual machine by adding new disk and expanding using LVM

Daily task, which comes as daily routing, to extend the disk space: 
 Switch off the machine 
 Open VM properties in Oracle VirtualBox Manager, Storage,
 
 Click [Create]
 
 Name the disk accordingly to be consistent with other drives. Ensure that disk is saved nearby the VM itself. In my case, I am extending root partition for 50 GB.
 
 After new disk is created, choose it double-clicking it.
 
 Should end by seeing new disk in the virtual machine properties under 'Storage' list, attached to proper controller, 'SATA' - in my case.
 
 Confirm with [OK] 
 Power on the machine 
 List disks with. New disk should be visible. 
 lsblk
 
 
 Follow LVM Disk Extension guide to finalize extension.