Log in the ftp, and then go to Magento 2 root folder (generally present under the public_html folder).
Create a new folder named code under the app folder; under code folder, create a folder named Ced.
Upload or Drag and Drop app/code/Ced directory.
After successfully uploading the directory, the extension will be installed/upgraded.
Now run the following upgrade command in cmd php bin/magento setup:upgrade
php bin/magento setup:di:compile
php bin/magento setup:static-content:deploy -f
php bin/magento index:reindex
php bin/magento cache:flush