ORACLE 11G External Table Error ORA-29913

Question

1. I created a folder named "datosext2" on C:\
2. I created a .txt file named "estados" on C:\datosext2
3. On sqldeveloper, I created a directory said folder

GRANT CREATE ANY DIRECTORY TO HR;
CREATE DIRECTORY EDOS_MEX AS 'C:\datosext2';
GRANT READ, WRITE ON DIRECTORY EDOS_MEX TO PUBLIC:

4. I created an external table named C_ESTADOS on said directory

CREATE TABLE C_ESTADOS (
  ESTADO_ID CHAR (2),
  ESTADO_NOMBRE VARCHAR2(50)
)
ORGANIZATION EXTERNAL (
  TYPE ORACLE_LOADER
  DEFAULT DIRECTORY EDOS_MEX
  ACCESS PARAMETERS (
    RECORDS DELIMITED BY NEWLINE
    BADFILE 'bad_estados.bad'
    LOGFILE 'log_estados.log'
    FIELDS TERMINATED BY ','
    (ESTADO_ID CHAR (2),
     ESTADO_NOMBRE CHAR(50))
  )
  LOCATION ('estados.txt')
);

5. I tried to run

SELECT *
FROM C_ESTADOS;

6. I got this error:

ORA-29913: error in executing ODCIEXTTABLEOPEN callout
ORA-29400: data cartridge error
error opening file C:\datosext2\log_estados.log
29913. 00000 -  "error in executing %s callout"
*Cause:    The execution of the specified callout caused an error.
*Action:   Examine the error messages take appropriate action.

7. I tried granting READ and WRITE privileges to my user, but it did not work, even though I got no error after granting said privileges