# 8. EFS Overview

EBS is linked to one EC2 instance at a time while EFS is linked to multi EC2 Instance at a time . Multi EC2 Instances share the common File storage.

![](/files/-MBh6WAv_9RrhROMZmrB)

![](/files/-MBh7-Wo-BlNkfh3lxxJ)

![](/files/-MBh7OaJ9JEF2_qqRLTF)

EFS Hands On : 

1\) First create Security Group : 

![](/files/-MBh7dvWRxDRjhYLuHtq)

![](/files/-MBh7nCRtLfHHrY__Bac)

![](/files/-MBh7rrpkjbbJFkoQArM)

![](/files/-MBh82xhpRyRZ5UHOf1o)

![](/files/-MBh8JxhckeFFRS1DKWN)

![](/files/-MBh8Q4n1p_-BBbSqrWi)

![](/files/-MBh8cusf7_DY9biL77G)

Now mount the EFS on Two EC2 Instances launched in two different AZs.

![](/files/-MBh9EV1Bx4lXZu3u0A7)

Now back to EFS :

![](/files/-MBh9LSSk-_wvM_e7JJu)

![](/files/-MBh9PfZvhHRj8jU54Rx)

![](/files/-MBh9jMbu4Iwujdppaoc)

![](/files/-MBhABtuqahHi2KIoR3z)


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