Transferring files from a temporary table to a regular table

Could you please advise, there is a need to upload one or more files into a temporary table (form) with subsequent insertion into a simple table, each in a separate row. I tried doing it like this:

Button action code in the temporary table, which should write files into the Simple:

=: listReplace(list: #h_file_field; action: $val; value: "value")
      val: insert(table: 'simple_table'; field: 'file_field' = $filesdata)
        filesdata: listCreate(item: $rowfile)
            rowfile: rowCreate(field: "name" = $#value[name]; field: "filestring" = $#value[filestring])

But this code does not work.

In the provided example, there is a lack of obtaining the file content, which is passed to filestring. In it, $#value[filestring] is passed to filestring, while in the File field structure there is no filestring key, but there is a file key that contains the file name on the server. That is, you need to get the file content using this file key.

Button action code:

=: listReplace(list: #h_file_field; action: $val; value: "value")
      val: insert(table: 'simple_table'; field: 'file_field' = $filesdata)
        filesdata: listCreate(item: $rowfile)
            rowfile: rowCreate(field: "name" = $#value[name]; field: "filestring" = $content)
                content: fileGetContent(file: $#value[file])

The fileGetContent function retrieves the file content — text or binary, as it is stored in the file system.