Encryption capability 

I recommend adding a column to show whether the format supports encryption. The table as it stands now is missing formats such as TrueCrypt, freeware that enables you to pack huge folders away into a single encrypted archive file. You can edit within the archive, then simply dismount and drag&drop; to make a backup of the archive. This method has become the bedrock of my file management. I would expect that many others use it this way as well (file management system that happens to be encrypted, rather than just plain encryption software).