Error for Transfer Failed

Hello,

I'm a total newbie to web-design. my friend built my website, but he takes a year to update when I almost need to update weekly. So I designed a new site. I have the index.html made w/ the content. He has a folder where the website is called "public_html". I made a new folder and dragged all the files into the new folder.

I then checked my site and it was down. So I knew that this was where the live files were.

Here in lies my problem; I want to add my new files. index.html/and other files, but it will NOT transfer over. I get this this exact error "Transfer failed. Use the Transfer Queue for automatic retries".


Does anyone know why it isn't letting me add my new files?


Thank you so much


Regards.