All of your local drafts, synced posts, and other blogging data used within the app are stored in a folder located within your home folder. From time to time you may want to access this data either to backup or restore the content, to add custom scripts or text filters to MarsEdit, or to carefully hand-edit a configuration file.
To easily access the MarsEdit data folder on your Mac, hold the option key on your keyboard while selecting the Help menu from MarsEdit. A menu item named Open MarsEdit Data Folder will appear. Select this item to reveal the pertinent folder in the Finder.