.QDF-BACKUP File Extension
File TypeQuicken Data Backup File
File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.
Backup file for the .QDF file, the primary data format used by Quicken, a personal finance software; contains saved accounts, transactions, portfolios, and balance information.
To restore these backup files in Quicken, go to, then look for the backup file you need to restore (will have the QDF-BACKUP extension), open the file you'd like to restore (a "Restore from backup file" window should appear), then determine a location on your local hard drive where you'd like to save the data file.