Hi @hirennamera .
Xtrabackup require physical access to the files it’s backing up, meaning you cannot use it to backup RDS instances.
I suggest you take a look at :
mysqldump - MySQL :: MySQL 5.7 Reference Manual :: 4.5.4 mysqldump — A Database Backup Program
mydumper - GitHub - mydumper/mydumper: Official MyDumper project
those two tools will take logical backups and can be used to backup remote hosts.