I used TI 10 to full system drive C back up to the USB external hard drive. I got the "MyBackup1" file as Acronis True Image Backup Archive but when I tried to validate backup archive it shows:"This is not the last created volume of the backup archive. Please insert the last created volume to start working with this archive." It's the same message when I test to restore my computer with this backup file. So What's wrong? How can I back up my system to the external HD and to restore from it ? Thanks.