The information at https://help.sonatype.com/display/NXRM3/Configuring+Blob+Stores and https://help.sonatype.com/display/NXRM3/Storage+Guide overlaps.
80% of the information in the HA specific document applies to blobstores in general ( and actually critical for proper functioning). The non HA specific info in the general guide is also relevant for HA.
Move the general storage information into one document. If an HA specific document is still needed, that document should only have unique information pertinent to HA deployments.