File Size Limitations
Theoretically, file sizes of up to 5Gb can currently be uploaded to the bucket with WP Offload Media, however, your server must be configured correctly. To increase the upload limit of your server to 500Mb, ensure the following configuration is applied:
php.ini
upload_max_filesize = 500M
post_max_size = 500M
You will also need to ensure that PHP has ample memory and doesn’t timeout:
memory_limit = 512M
max_execution_time = 600
Nginx
Nginx servers require additional configuration.
nginx.conf
client_max_body_size 500m;
Remember to reboot PHP and Nginx (if applicable) for the changes to take effect.