About the storage, there are three ways:

  1. Connect this camera to your NVR, and install a hard drive to your NVR, then all the data will storage to your hard drive
  2. Local storage, this camera support up to 128G micro card, and you can view and download the video on your smartphone or PC.

So, if you want to record its images and video to your western digital wd 2100 NAS drive, then you can buy an NVR that supports external hard drive installation. like this one below: