To change the max file upload size in Wordpress, do the following:
- Go to the Xampp control panel.
- Stop Apache
- On the Apache line, click on "Config" and select "PHP (php.ini)"
- Edit this file - look for "upload_max_filesize" and set it to the value you want.
- Start Apache
- Verify file size in Wordpress - Look at "Media", "Add New" and see what it says.
It's currently set to "256M". I tried 1024M but all that did was max it out to 260M so either there is another setting somewhere else or the internal max is 260M.