qFileSync keeps the contents of two or more folders "in sync"--in other words, identical. If you have two identical folders, and you use qFileSync to keep them in sync, you can update a file in either folder and qFileSync will automatically copy the newer file over the older version. qFileSync is much more efficient than copying a folder manually because it only copies the files that have changed.
qFileSync also offers Merge and Mirror modes, which are for "one-way" synchronization; I'll talk about these later.
Sets of folders to be synchronized, and associated options, are called "Sync Sets", and qFileSync remembers all sync sets when you quit the program. When you start qFileSync for the first time, one Sync Set is automatically created, called "Untitled". If you like, you should give the set a new name. Then, you need to go through the following steps to set up a synchronization:
If a folder you want to sync with does not yet exist, or if it is at a network location to which you can't browse, just choose a "dummy" location (like C:\) and then change the label in the list. You can change the folder path the same way you would rename a file in Explorer: click the folder's label in the list, then click again (without double-clicking). You can then type a new path.
If the path you've typed does not yet exist, select it and check the box labelled Allow base folder creation. The folder will be created when you synchronize. Note: at least one of the folders in the list must exist already.
After you've set up the Sync Set, click Synchronize or Interactive Sync to perform the synchronization. Synchronize synchronizes automatically if the situation permits, but it will bring up the Confirm dialog box if conflicts arise, showing only files with conflicts in the file list. Meanwhile, Interactive Sync always brings up the Confirm dialog box, and shows all files to be synchronized in the file list.
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