WordPress’ file uploader is a very handy tool for all of us, as it let us upload our files directly to our server, without using ftp clients or hosting tools. The default maximum upload file size limit in WordPress is 32mb, and you can’t upload any larger files than that. However, it’s easy to increase this limit.
There are tons of tutorials about this trick, but most of them won’t work because of your hosting provider. Here’s a trick from Word Impressed which will definitely do this work for you.
Create a php.ini file and upload it into your /wp-admin/ folder and add following snippet into the file:
memory_limit = 100M
upload_max_filesize = 100M
post_max_size = 100M
file_uploads = On
You can change the above code to whatever max file size you want.