Batch Save tool in the Component Families toolset helps save all component families of some project files in batch out to family files, named and placed as opted.
After the ribbon button is clicked, a dialog appears to ask for files.
If the OK button is clicked, another dialog will appear to collect options for the batch saving.
Next, those files will be opened one by one and their component families will be saved out accordingly as named to the folders as specified. A progress bar will show how many files in total, which file is currently being processed, and what remaining time may be. Since it takes some time for each file to be parsed, another progress bar will also be shown. An information box will finally show what have happened.
The folder structure and all those new family files may look as follows in the Windows Explorer.