You can do this in two ways. One way is AWS CLI and another way is AWS Console. The following copy-snapshot example command copies the specified snapshot from the us-west-2 Region to the us-east-1 Region and adds a short description using the AWS CLI command.
$ aws ec2 copy-snapshot \
--region us-east-1 \
--source-region us-west-2 \
--source-snapshot-id snap-066877671789bd71b \
--description "This is my copied snapshot."
If you want to do with the console, then follow the below link.