How to add a file to a custom field "file"?

Question

1C-Bitrix

Hello!
I'm making a file uploader. I save downloads in HL.
To save a file, I use the CFile::SaveFile method . The file is downloaded and the ID of that file is returned to me.

if (is_uploaded_file($_FILES["file"]["tmp_name"])) {

                $arFileArray = array(
                    "name" => $_FILES["file"]["name"],
                    "size" => $_FILES["file"]["size"],
                    "tmp_name" => $_FILES["file"]["tmp_name"],
                    "type" => $_FILES["file"]["type"],
                    "MODULE_ID" => "highloadblock"
                );

                $FileID = CFile::SaveFile($arFileArray, "highloadblock");
            }

How to write the received ID or array into a custom field of the file type?

$hlblock_id = 1;
            $hlblock = HL\HighloadBlockTable::getById($hlblock_id)->Fetch();
            $entity = HL\HighloadBlockTable::compileEntity($hlblock);
            $entity_data_class = $entity->getDataClass();

            $result = $entity_data_class::add(
                "UF_UPLOAD_FILE" => $FileID
            );

Answer 1

"UF_UPLOAD_FILE" => \CFile::MakeFileArray($FileID)

Answer 2

Bitrix has glitches with the File field type in HL blocks. The value cannot be saved.
I solved the problem head-on: I gave the field with the file the type "Number" (you can give the type "String") and wrote down the file ID there without any problems.