I'm using a Lenovo Tab 4 for a monitor with my P4. Love the combo, the Tab 4 works well for me other than the meager storage space. I installed a good quality 32 gig micro sd card but can't get the video cache to go there. Soon as I hit the top of the internal storage (16 gigs), it quits. So, how can I get the cache to go directly to the tab's sd card and bypass the internal storage?? Thanks!