If you have your website files on a compressed archive with .zip, .tar, or .gz format, you can easily upload them using the Import Website feature!
To upload your backup, open Websites → Manage. In the left sidebar, search for Import Website, and click on it:
Once there, click on Choose a file to select your .zip, .tar, or .gz archive:
Next, click on Import - your archive will be uploaded and extracted to your public_html folder automatically!
The maximum allowed size for uploading a file using this feature is 256MB
If you want to upload a larger file, it's recommended to use the File Manager or an FTP client