copy an exported dump file to a target DB instance - LOG
You can see a list of the files in the DATA_PUMP_DIR directory by running

 select * from table(RDSADMIN.RDS_FILE_UTIL.LISTDIR('DATA_PUMP_DIR')) order by filename;


Additionally, you can read the contents of the file by using

select * from table(RDSADMIN.RDS_FILE_UTIL.READ_TEXT_FILE('DATA_PUMP_DIR','filename.log'));


(Credit for the last script goes to: https://www.experts-exchange.com/questions/28961936/open-a-file-on-a-remote-server-amazon-rds-oracle.html)

I hope it helps