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+====== File Upload ========
+The question type "File Upload" allows participants to upload a file to the survey server during the interview.
+**Important:** The amount of memory per survey project is limited. Depending on their content and file type, uploaded images require a lot of storage space.
+**Important:** If participants upload large files (>500 KB), it may take a while after clicking "Next" until the file is transferred and the next page is loaded.
+===== Download Files =====
+The uploaded files can be downloaded under **Collected Data** -> **Uploaded Files**. Either individually or bundled by question. The file name contains the number (CASE) of the data set in each case.
+===== Show Image =====
+If the uploaded file is an image, you can use it in the current interview. The filename prefix ''%%upload://%'' allows access to the uploaded files.
+For the display, you still need the file name that SoSci Survey assigned when uploading the file. You can retrieve this from the dataset using ''[[:decreate:functions:value]]''. Together with the necessary HTML code, the display could then look like this. In the example, the question for "Upload file" has the identifier UP01.
+<code php>
+html('
+    <div>
+        <img src="upload://'.value('UP01x02').'" style="max-width: 100%">
+    </div>
+');
+</code>
+**Note:** If participants upload large files, this can also lead to long loading times when the files are later integrated.