When you attempt to open, backup, or restore your Quicken data file, an error message “Quicken Can't Open Your Data File” may display suddenly on the computer screen. However, this can usually happen when you try to open your Quicken data file which is stored in your Dropbox folder or another online storage folder. Therefore, it is highly recommended that you always prefer opening your data file from your computer instead of opening it directly from Dropbox or other online storage folders. By doing this, you can frequently without any obstruction open your data file in Quicken and further manage them accordingly.