I am using WD My Passport Essential - 500GB USB drive.
When I enable EFS (Encrypting File System) on my Windows 7 computer to encrypt the files, the WD smartware software is unable to backup or restore the data. The files and folders are created on the WD hard drive, but if I browse the hard drive manually, I cannot open the files. Also, if I try to restore the file using the WD application, I get an error.
If I disable EFS (Decrypt the files) on my computer, the whole backup system works well.