From Mike L. Martin, Director, LBPH, California State Library:
Plug the cartridge in to the Stream using a male/female USB cable
Press “3” on the VRS keypad and you will be prompted to transfer a book or magazine to the SD card.
In order to accomplish this transfer the book or magazine must be engaged and not merely pointed to from a folder. A patron must press play or engage a specific book or magazine before he/she can transfer that item from cartridge to SD memory card.
There is no way to mass transfer multiple items from a cartridge. Each book or magazine from the VR_DTB folder (bookshelf) must be transferred one at a time. This process works for blue, red, and gray cartridges, i.e. contractor-produced or patron downloaded items.
From Craig Hayward, NC LBPH:
There is one method of doing a multiple item transfer to a Victor Reader Stream, provided you have computer access. This will not work for those who hook a cartridge to the Victor Reader Stream directly. The Humanware Companion, available for free from the Humanware website, will do multiple transfers of items from a cartridge to a Stream. Best of all the content goes directly into the correct folder and the program unzips the book or magazine for you.