Font I Want provides the easiest font upload experience: you just need to drag ALL your font files into it, and the plugin will automatically sort all the files automatically.
In order to upload your custom fonts, please, press either the 'Upload' button in the Favorites or the 'Uploaded' link in the Font Library.
You can drag and drop the font files from your desktop to the upload section or click on it to choose the font files.
When the upload process is finished, you can add the fonts to your Favorites.
To delete the font files completely from your server, use the green 'delete' link.