2012

Alternatively, you can click the Add File Spec button. This will
make Autodesk Navisworks convert the files located in the selected
folder. The option chosen in the File Type menu determines which
files are converted.
3 In the Output area, As Multiple Files tab, choose the location for the
converted files. By default, files are created in the same location as source
files.
If you want to change the output location, select the Output to
Directory radio button, and click the Browse button. Use the Browse
for Folder dialog box to select the desired folder.
4 Select the Increment Output File Names radio button if you want
to append a four digit number to the end of file name. By default, the
old output files are overwritten.
Manage Files | 231