I've looked throughout the site and thread and I am not able to unlock the mystery of how to purge what is in my cloud storage, and then select what is automatically being synced into the cloud from my HTC One - M8 Android.
Easiest way I can think of to blow away all of your cloud content is to use the web interface (or possibly the desktop app) and delete them in bulk from there. Then go back to you phone cloud app, and select what to backup under settings.
MarketBlogger we'll walk you through the steps! You can reset the Verizon Cloud app by http://vz.to/1tja3RL .AshleyS_VZWFollow us on Twitter @VZWSupport