Let us assume your databse storage folder is /var/lib/mongo ,which wants to keep daily sync using s3 bucket in order to recover the data due to unexpected server failure
-First do SSH login to the AWS ec2 instance and then do the follwing confuguration setup.
# aws configure
AWS Access Key ID [None]: xxxxxxxxxxxxxxxxxxx //Your AWS Key
AWS Secret Access Key [None]: yyyyyyyyyyyyyyyyyyyyyyyy //Your Secret Key
Default region name [None]: us-east-1
Default output format [None]: ENTER
then please enter the following command
aws s3 sync /var/lib/mongo s3://YourBucketName/database/
if u want to setup daily sync then just go to crontab and add the above command with the prefer time .