kung may nag cclick kang na ririnig TS baka HDD yan either
may bad sector sa HDD mo
or failing yung HDD
or naalog kase natuktok via/ force ung unit ~ nagalaw or nausog
usually nawawala naman yan (not sure about this) pero pag persistent..
tech help is needed pero kung kaya mo naman xang gawin den check your HDD health for bad sectors