Make a blank text file. Save As php.ini
Add the code below in the text file:
upload_max_filesize = YOUR MAX SIZE
post_max_size = YOUR MAX SIZE
Ensure the ‘YOUR MAX SIZE’ is replaced by definite size e.g 64M
Insert the php.ini file into the folder you’ve set up your website e.g put it in the same folder you have WP installed so it doesn’t affect my whole site.