I have a Nexus 10 tablet and I'm getting the items together that will allow me to move files around. I have an OTG cable plus SDHC chip in a mini reader and will soon select one of several apps that allow me to move data between the GPSr and external storage. I'm not quite there; have to learn about Rooting first and then expect everything to drop into place.
I will only be able to move files around with the above items, not create routes etc. Later I hope to use the Dual Sport Maps app to create and manage routes that I can transfer to the GPSr. Others have already used DSM to navigate using an android device, so that will be in my future, as well.
Just gotta find the time to learn all this...