You need to edit the correct php.ini file and increase the value of the following variables to the desired size: memory_limit, upload_max_filesize and post_max_size The php.ini file is located at: On Linux server: /usr/local/psa/admin/conf/php.ini On Windows server: C:\Program Files (x86)\Parallels\Plesk\admin\php.ini Then you will need to restart your webserver & PSA.