- Login to SiteGround.
- Go to File Manager.
- Make sure that public_html folder is empty. If not, delete everything in it.
- Go to WordPress > Migrator.
- Click Generate.
- Copy the Migration key.
- Login to your existing website (the one you want to migrate).
- Install and activate SiteGround Migrator plugin.
- Go to SiteGround Migrator on the left menu.
- Paste the migration key.
- Click Start migration.
- Click continue (even if it says something about domain change).