NTF Format
NTF is the new (proprietary) format introduced by NOTEFILE which is used to store your note data together with some configuration data (like Quick Search Items...) in a single file with NTF extension in its file name. By using this format, the configuration information and the contents of each card is stored as a separate record in a binary file. The data is stored compressed, so it generally takes much less space than a TXT file. You also have the option to encrypt the file by giving a password in File Setup....