MotorolaDeviceManager_2.2.28.exe for windows
MDM_Installer_2.0.32.dmg for mac
Get these files from MOTODEV > Tools & Testing > USB Drivers
To use http://192.168.16.2:8080/webfolder in Internet Explorer
After installing the file manager
you need to open IE web browser and go to http://192.168.16.2:8080
Then select file manager (make sure phone is connected to usb slot and if you are using VM (virtual machine) that the usb has been activated) and user1 (should be the only drop down menu option).
This will map http://192.168.16.2:8080/webfolder so it can be used in Explorer File Browser.