Force download of image

Hi , sorry for english , i want create a link to download image and pdf from server folder .

This is the code :

Code:

<?= $v->nome_file_originale ?><a download="<?= $v->nome_file_originale ?>" href="<?=base_url() ?>/uploaded/xyz_xrh/documenti/<?=$record->id_users?>/<?= $v->nome_file ?>" >Download</a>

it work only with pdf ...