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Ultra Recall stores the information it manages in files called Info Databases. These files have a .urd extension, and use a compressed, binary format, that can optionally be encrypted using a password supplied by the user.
Each Info Database is a single file that can be located anywhere on your computer. The default location is your My Documents directory, but another possibility is to place your Info Databases in a separate folder (such as C:\UltraRecall\).
You can store all your information in a single Info Database, or use many (unlimited) Info Databases.