Quicken includes a series of commands for managing your files. It's important to use these Quicken commands because the data file you use in Quicken 2009 or earlier (QDATA by default) is really made up of several separate files, each beginning with QDATA and having a different extension such as .QDF, .QEL, .QPH, and so on. When you use the Quicken commands to back up or rename your Quicken data, Quicken knows which files go with it, so you don't have to keep them all straight.
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