Here is the content of the system.xml file:

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Config:etc/system_file.xsd">
        <section id="develodesign_productpagerendermsg" showInDefault="1" showInStore="1" showInWebsite="1" sortOrder="10" translate="label">
            <label><![CDATA[Product Page Stock Location]]></label>
            <group id="company_flag" translate="label" type="text" sortOrder="6" showInDefault="1" showInWebsite="1">
                <label>Company Display Settings</label>
                <field id="custom_message" translate="label" type="Magento\Config\Block\System\Config\Form\Field\File" sortOrder="1" showInDefault="1" showInWebsite="1" >
                    <label>Identifier, SKU and Custom Message CSV Mapper</label>
                    <upload_dir config="system/filesystem/media" scope_info="1">catalog/custom_message</upload_dir>
                    <comment>CSV Header must be set to Company Id, Product SKU, and Custom Message.</comment>

                <field id="employee_mapper" translate="label" type="Magento\Config\Block\System\Config\Form\Field\File" sortOrder="3" showInDefault="1" showInWebsite="1" >
                    <label>Employee Name, Sole Code and Boot Code CSV Mapper</label>
                    <upload_dir config="system/filesystem/media" scope_info="1">catalog/company_employee</upload_dir>
                    <comment>CSV Header must be set to Employee Name,Sole Code and Boot Code. Allowed file types: csv, xls,text/csv</comment>
                <field id="product_sku" translate="label" type="text" sortOrder="2" showInDefault="1" showInWebsite="1" showInStore="4">
                    <label>Product SKU</label>


I am using a custom class ....\General\Model\Config\Backend\FileUploader that extends magento Magento\Config\Model\Config\Backend\File Here is the file input greyed out in the admin frontendgreyed out file upload input. Inspecting the element I can see a class 'disabled' being added to the input, removing this class sure fixes the issue, of course, I can add a js file to remove the attribute on document ready, however, I am more interested in why its disabled in the first place.

1 Answer 1


The backend model has to changed to below for files


For images the backend model should be


And for PDFs


  • I am using a custom class Develodesign\General\Model\Config\Backend than extends the Magento\Config\Model\Config\Backend\File
    – Raphael
    Nov 3, 2020 at 15:05

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