Mobtime Cell Phone Manager is an Universal Software to manage most of mobile phone with your PC.
You can manage your SMS, Media File, PhoneBook, or Calendar using this software.

Download MobTime Cell Phone Manager

If you want to connect your motorola W375 mobile to your pc, you have to download the following package.
The package contains both of drivers file and usbser.sys (USB modem driver)

Download Motorola W375 USB Driver