I’ve just about filled the 32 GB internal storage on my Nokia Lumia 920. Initially, I was surprised that it only took me six months, until I realised that I’ve been recording videos in HD. When you consider everything that relies on internal storage, it certainly seems like a complete removal of personal storage is required. There are several options. Backing up data can be performed manually, using the Windows Phone Tool via USB and you can rely on native tools to back up your photos, apps, settings and messages.