How to Store Blob File Outside Oracle Database In Oracle APEX

1: add privilege to use UTL_FILE  to You User

grant execute on utl_file to STOCK;

2 : Create Directory to save File and add privilege to write on Directory to You User

CREATE OR REPLACE DIRECTORY STOCK_DIR AS 'F:\STOCK_IMAGES';

GRANT read, write ON DIRECTORY STOCK_DIR TO STOCK;

3: Use this Procedure to write BLOB file to your disk

create or replace PROCEDURE blob_to_file (p_blob      IN OUT NOCOPY BLOB,
                                          p_dir       IN  VARCHAR2,
                                          p_filename  IN  VARCHAR2)
AS
  l_file      UTL_FILE.FILE_TYPE;
  l_buffer    RAW(32767);
  l_amount    BINARY_INTEGER := 32767;
  l_pos       INTEGER := 1;
  l_blob_len  INTEGER;
BEGIN
  l_blob_len := DBMS_LOB.getlength(p_blob);
  
  -- Open the destination file.
  l_file := UTL_FILE.fopen(p_dir, p_filename,'wb', 32767);

  -- Read chunks of the BLOB and write them to the file until complete.
  WHILE l_pos <= l_blob_len LOOP
    DBMS_LOB.read(p_blob, l_amount, l_pos, l_buffer);
    UTL_FILE.put_raw(l_file, l_buffer, TRUE);
    l_pos := l_pos + l_amount;
  END LOOP;
  
  -- Close the file.
  UTL_FILE.fclose(l_file);
  
EXCEPTION
  WHEN OTHERS THEN
    -- Close the file if something goes wrong.
    IF UTL_FILE.is_open(l_file) THEN
      UTL_FILE.fclose(l_file);
    END IF;
    RAISE;

END blob_to_file;

4- use this process to upload file 

DECLARE
  l_blob  BLOB;
BEGIN
  -- Ge SELECT filename,
select
                      BLOB_CONTENT INTO   l_blob
                   FROM apex_application_temp_files
               where NAME= :P5_PRODUCT_IMAGE ;
  
  

  blob_to_file(p_blob     => l_blob,
               p_dir      => 'STOCK_DIR',
               p_filename => :P5_PRODUCT_IMAGE);
END;

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How to Store Blob File Outside Oracle Database In Oracle APEX