With TI9 on Monday did a manual full system backup to an external hard drive dedicated to backups only-NO PROBLEM. On Tuesday did a manual Incremental backup-NO PROBLEM. On Wednesday did a manual Incremental backup-NO PROBLEM. PROBLEM: On Thursday attempted to do a manual Incremental backup but it would not work. Doing manual Incremental backups seem to be very straight forward. Follow the wizard, select the Monday and move along. After I select “Proceed” almost instantaneously I get the error message “Operation has completed with errors, Please, see log for more detail.” The log says” Operation with partition “C:” was terminated. [Details] Unable to create volume snapshot (0x 70021). Why is this? It worked fine for 2 days then a PROBLEM. Same thing happened last week on the third Incremental attempt after full backup.