29c06976___lost_external_hard_disk_data__Reason_for_Data_Loss
[Scenarios] Virus Attack [Reason for Data Loss] 
Virus infections can also cause hard drive failure as it directly attack the file system of the external hard drive. This leads to inaccessibility of the files. Your external hard drive will get freeze after the virus attack.
External Hard Drive File Recovery - Tool to restore deleted / lost external hard disk data
Reason for Data Loss