how to increase the wordpress multisite network limit for maximum filesize upload 3f

11. Update .htaccess file
2
3  php_value upload_max_filesize 128M
4  php_value post_max_size 128M
5  php_value memory_limit 256M
6  php_value max_execution_time 300
7  php_value max_input_time 300
8
9Change the numbers to the values that you need. The max execution time and max 
10input time values are in seconds and might need to be increased further if 
11your internet connection is slow.
12
132. Update wp-config.php file
14
15  @ini_set( 'upload_max_filesize' , '128M' );
16  @ini_set( 'post_max_size', '128M');
17  @ini_set( 'memory_limit', '256M' );
18  @ini_set( 'max_execution_time', '300' );
19  @ini_set( 'max_input_time', '300' );
20
21reference : 
22https://help.servmask.com/2018/10/27/how-to-increase-maximum-upload-file-size-in-wordpress/

1php_value upload_max_filesize 12M
2php_value post_max_size 13M
3php_value memory_limit 15M