For an existing website, use a new subfolder for the page first. That lets you check its URL without replacing the site's current home page.
Identify the domain and its document root
Open File Manager, then Settings. Select Document Root for and the target domain when that option is available. The main web root may be public_html, but do not assume every additional domain maps to that folder.
Inspect the destination before changing anything. If the domain already has a site, leave its files in place and choose a clearly named unused subfolder, such as workshop-notice. If File Manager is absent, your hosting provider may have disabled the interface; ask which supported upload route your hosting account provides. Folder selection and availability
Preserve the page's asset paths
Suppose your illustrative local folder contains:
workshop-notice/
index.html
styles.css
images/
entrance.jpg
Inside index.html, the matching relative references are:
<link rel="stylesheet" href="styles.css">
<img src="images/entrance.jpg" alt="Workshop entrance">
If you upload the HTML without styles.css and the image folder, the text may load while the layout and image fail. Keep the same relative arrangement on the server.
File Manager's Upload action accepts files. For a folder, cPanel documents uploading a compressed archive and then using Extract. Inspect the archive's structure before extraction and select the intended destination. Upload and extract procedure
Avoid accidentally creating workshop-notice/workshop-notice/index.html. Whether an archive includes its outer folder determines where its contents land. After extraction, browse the actual folders rather than assuming the upload filename tells you the resulting location.
Open the exact URL before changing a home page
If the chosen domain is example.com and the new folder sits directly inside its document root, test:
https://example.com/workshop-notice/index.html
That address is an example. Use your real domain and inspect the response in a browser. Check a distinctive sentence from the new page, its stylesheet, and its image. A hosting control panel's upload-complete message does not confirm those requests.
If you get a 404, compare the URL with the domain's document root and the extracted folder names. If the page loads without styling, open the stylesheet URL and compare its path and capitalization with the filename. If you see another page, confirm the domain and exact file URL before overwriting an existing index.
For general folder portability, see static HTML hosting. Finish this upload by checking the intended address on a narrow screen and keeping a local copy of the files you placed there.