Hello @katovonkatz ,

The .htaccess is located in your WordPress site’s root folder. WordPress uses it to manage redirects and permalinks. You can refer to this link for more information.

https://themeisle.com/blog/htaccess-file-in-wordpress/

You can then update the post_max_size and upload_max_filesize from /usr/local/lsws/lsphp73/etc/php/7.3/litespeed/php.ini

Then do killall lsphpnew to restart PHP process, then it should work.

Request you to refer to the below links as well

https://www.digitalocean.com/community/questions/increase-max-filesize-for-wordpress-files-one-click-installation

https://digitaloceancode.com/increase-maximum-file-upload-size-in-digitalocean-wordpress/

https://www.digitalocean.com/community/questions/how-to-change-the-maximum-upload-file-size-in-litespeed-wordpress

Cheers,
Lalitha