Unable to save remote backup FTP server settings: Error: Unable to access to the storage: Transport error: unable to list directory: Curl error: (9) No such file or directory

Symptoms

• Unable to save the FTP remote storage settings from Plesk > Tools & Settings > Backup manager > FTP Settings . The following error is shown:

  PLESK_ERROR: Error: Unable to access to the storage: Transport error: unable to list directory: Curl error: (9) Access denied to remote source: Last FTP request: CWD backup Last FTP response: 550 backup: No such file or directory
  Make sure you have entered the correct storage settings. You can check them independently with the command: curl -v -P - -u john.doe 'ftp://203.0.113.2//backup/plesk//'

• Non-existing directory on FTP server is specified under Tools & Settings > Backup manager > FTP Settings > Directory for backup files storage field.

  OR

  The full path to home directory of FTP user is specified under Tools & Settings > Backup manager > FTP Settings > Directory for backup files storage field

Cause

Misconfiguration of Directory for backup files storage field under Tools & Settings > Backup manager > FTP Settings.

Resolution

Specify the correct directory in the Directory for backup files storage field using the Relative path within FTP user.

Additional information

How to configure FTP backup in Plesk