Owing to space crunch of my web hosting server, I want to save my files on dropbox using the upload field of editor. My files are being saved to both hosting account as well as at dropbox. I'm unable to figure out how to customize the upload action to save at dropbox only.

    { 
         label: "Upload File:",
         name: "Image",
         type: "upload",
         display: function(file_id, row, type, data) {
             if (file_id) {
                 var local_file_path = childTable_Editor.file('files_Certificates', file_id).web_path;
    
                 var linkClass = 'link-' + file_id;
    
                 var initialLink = '<a class="' + linkClass + '" href="#" target="_blank">Loading link...</a>';
    
                 $.ajax({
                     url: 'dropbox_upload.php',
                     type: 'POST',
                     async: true,
                     data: {
                         'local_file_path': local_file_path,
                         'Party_Code': <?php echo "'".$_SESSION['Section']."'"; ?>,
                         'Division': <?php echo "'".$_SESSION['Division']."'"; ?>,
                         'Region': <?php echo "'".$_SESSION['Region']."'"; ?>,
                         'filename':childTable_Editor.field( 'Certificate_Number' ).get(),
                         'dropbox_path': "/FCI/"+<?php echo "'".$_SESSION['Region']."'"; ?>+"/"+<?php echo "'".$_SESSION['Division']."'"; ?>+"/"+<?php echo "'".$_SESSION['Section']."'"; ?>+"/FSSAI/"
                     },
                     success: function(response) {
                         var result = JSON.parse(response);
                         if (result.success) {
                             $('.' + linkClass).attr('href', result.link);
                             $('.' + linkClass).text('Uploaded file id : ' + file_id);
                         } else {
                             alert(result.message);
                         }
                     },
                     error: function(xhr, status, error) {
                         alert("An error occurred: " + error);
                     }
                 });
    
                 return initialLink;
             } else {
                 return 'No file';
             }
         },
        }

My php script as follows -

    Field::inst( 'Image' )
        ->setFormatter( Format::ifEmpty( null ) )
        ->upload( Upload::inst( $_SERVER['DOCUMENT_ROOT'].'/Certificates/__NAME__.__EXTN__' )
        ->db( 'files_Certificates', 'id', array(
            'filename'    => Upload::DB_FILE_NAME,
            'filesize'    => Upload::DB_FILE_SIZE,
            'web_path'    => Upload::DB_WEB_PATH,
            'system_path' => Upload::DB_SYSTEM_PATH
        ) )->validator( Validate::fileExtensions( array( 'png', 'jpg','pdf', 'jpeg', 'gif','xls','xlsx' ), "Please upload proper file i.e. image or pdf" ) )
        )

Kindly suggest me the necessary changes to resolve the ibid issue.

Thanks & Regards
Shatrughan