I tried to backup my C drive onto a file on my external USB drive. I got an error "operation failed VSS:cant read volume data error source hard disk manager error code Ox12016". There was an arc folder created on the external drive with 4 image files and a PBF file. I have no idea how to access these files or what to do with them. I do not want to restore my PC with these files. I am not sure what to do now. I do not trust these files to be proper backup files. Any ideas? I have a desktop PC, HP Pavilion. I am using the free version of Paragon backup and recovery. My PC does not have a problem. I am looking for a backup program I can use to save my OS and my data.