Just FYI
it is failing on excluding the disk because it is removable. EC software does not cache any partition labeled ass removable media so it is not being cached anyway.
That said there is nothing in any of the marketed materials that state this feature is even part of the software therefore it could not have impacted your decision to purchase the product. This is not a supported feature of the retail version of this product and the information will be removed from the readme in the next version.
