# Unable to upload big files

It can happen that MXSuite fails when uploading a file larger than 30 MB.   
When you expect that MXSuite will upload the file, the upload will never happen.

This can be related to a missing setting in the file: applicationHost.config.  
You can find this file in C:\\Windows\\System32\\inetsrv\\config  
  
The following line must be added:

```json
<requestLimits maxAllowedContentLength="262144000" />
```

This line must be added between

```json
 <security> 
 <requestFiltering>
[Other commands]

 </requestFiltering> 
 </Security>
```

**Example below:**

```json

                    <add fileExtension=".refresh" allowed="false" />
                    <add fileExtension=".compiled" allowed="false" />
                    <add fileExtension=".msgx" allowed="false" />
                    <add fileExtension=".vsdisco" allowed="false" />
                    <add fileExtension=".rules" allowed="false" />
                </fileExtensions>
                <verbs allowUnlisted="true" applyToWebDAV="true" />
                <hiddenSegments applyToWebDAV="true">
                    <add segment="web.config" />
                    <add segment="bin" />
                    <add segment="App_code" />
                    <add segment="App_GlobalResources" />
                    <add segment="App_LocalResources" />
                    <add segment="App_WebReferences" />
                    <add segment="App_Data" />
                    <add segment="App_Browsers" />
                </hiddenSegments>
            </requestFiltering>
            <requestLimits maxAllowedContentLength="262144000" />
        </security>
```

After the file is saved, a restart of the IIS Server is required.

<p class="callout info">Administrative rights of this folder must be present for the current user</p>