Hi Roger,
Thanks for reaching out with your BoldGrid questions today. It sounds like you are looking to upload an image to your site today, if this is the case I included the guide below on how to upload media files to your WordPress site.
https://codex.wordpress.org/Uploading_Files
I hope this helps guide you in the right direction. If this doesn’t fit what you are looking for you are more than welcome to reach back out and if you could clarify what you are specifically trying to upload or any issues you are having we’d be happy to investigate this further.
I hope this helps. Please reach back out to us if you have further questions, we look forward to assisting you further with this!