Introduction - If you have any usage issues, please Google them yourself
The basic method of export:
CREATE OR REPLACE DIRECTORY test_ (directory AS /u01/app/oracle/oradata/ (alias) here for the hard disk path)
GRANT READ, WRITE ON DIRECTORY test_ (directory TO Scott (alias) specifies the user name (/public) for all users)
Expdp scott/scott@orcl directory=test_ DUMPFILE=xx.dmp schemas=scott logfile=expdpScott.log version=10.2.0.1.0 (user name) (import data version, with version optional)