StrongDisk Pro - The best on-the-fly encryption software.
StrongDisk Pro enables to keep sensitive data on virtual encrypted disk, which works as a common disk, but all its content is encrypted on-the-fly. To mount protected disk a password and an external key is required. Any files, documents, tables and databases can be kept on and opened directly from encrypted disks. The content of encrypted disk is physically stored in a common file that enables to make backup copies easily.