go to ec2 -> storage -> select volume and modify -> i updated to 28 GB

so on aws volume size is 28 but in server it is not updated till we have to update

if you see we have to mount volume and update to xvda1
sudo growpart /dev/xvda 1 sudo resize2fs /dev/xvda1
after this 2 command volume will update now you can see size increased to 28 GB