Create a text file on your PC and paste this in it:
memory_limit = 128M
upload_max_filesize = 100M
post_max_size = 128M
If you are using cPanel, name the file php.ini. If you're using one of the older Classic Hosting Linux servers, call the file php5.ini.
Upload the file to the root directory of your hosting plan. For cPanel, that would be public_html. For the older servers, it's just the main / folder.
Give it a couple of hours since it has to wait for the server to do a soft reset after you make changes. If you have cPanel, go to the PHP processes area and kill the processes. After that will will recognize the new php.ini file immediately. Otherwise, like I said, wait a couple of hours.”