What is Storage Driver and types of storage driver ?

Storage Driver is used to store and manage images and containers on Docker host.

Types of Storage Drivers

aufs

btrfs

devicemapper

vfs

zfs

root@ip-172-31-28-155:/home/ubuntu# docker info
Storage Driver: overlay2
  Backing Filesystem: extfs
  Supports d_type: true
  Native Overlay Diff: true
  userxattr: false