Whatsapp has now added a setting to let user to chosse whether to download images or video automatically or manually it has now option to choose to download images on Wi-fi or Mobile. Due to this setting many people will save lots of Mobile Data.By default whatsapp will download the Videos, photos and images automatically to your device from the messages. And obviously this might cause huge data usage on Your Mobile Data or Wi-fi.
> Go to Settings -> Chat Settings
> Technical self-discharge -
> Check appropriate option
"By using mobile data or
When connected 'Wi-Fi' and 'roaming'.
Just Select the Setting you desire and Enjoy