Ellen White agrees and supports the Biblical teaching that the Ark of the Covenant has an earthly, as well as a heavenly dimension.  The true Ark of the Covenant is in heaven (Rev. 11:19), while a copy of the true was built by Moses in the desert (Exodus 25:9-11, 40), according to the instructions given by God (Exodus 25:40).  The following document has the relevant quotes from Ellen White on this topic.