Yeah, that does seem to strongly and repeatedly indicate it's one-way. Usually users will add too much stuff to the Library given the extra SD capacity to be able to squeeze it back into the 3 Gb space internally.

But, this begs the question: what does a user like sammieb77 do when the eDGe has to be factory reset (i.e., a full wipe which means a new empty library in Internal Storage) when they had their library on an SD card? How are they access their original Library on the SD card? My guess: go through the same procedure with another empty SD card; then, when you switch SD cards, your old Library will magically appear.

In any case, sammieb77, you can probably ignore my wild goose chase of a suggestion to try to move your Library back to Internal Storage. Tech Support appears to remain your last, best hope.