Failure with backup. The report asked to get in contact with the support departement

System.IO.FileNotFoundException: Kan bestand O:\Data O schijf\Back-up emails\backup_202002160946.zip.incomplete niet vinden.
Bestandsnaam: O:\Data O schijf\Back-up emails\backup_202002160946.zip.incomplete
   bij System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
   bij System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost)
   bij System.IO.FileStream…ctor(String path, FileMode mode, FileAccess access)
   bij MailClient.Storage.Backup.BackupCompressionTool…ctor(String backupDirectory)
   bij DbBackup.FormBackup.Backup(CancellationToken cancellationToken)
   bij DbBackup.FormBackup.<>c__DisplayClass28_0.<mainform_load>b__0(Object a, DoWorkEventArgs b)
bij System.ComponentModel.BackgroundWorker.OnDoWork(DoWorkEventArgs e)
bij System.ComponentModel.BackgroundWorker.WorkerThreadStart(Object argument)

</mainform_load>

Can you try backup to the default location and see if there is any difference?

The default is C:\Users_yourusername_\Documents\eM Client.