Merry Christmas, I recently got this tablet. This advice is only for NS-14T002 (as far as I know). How to get Root access.
After finishing here, see my Guide on installing...
[GUIDE] How to Root - Insignia Flex 8" NS-14T002
After finishing here, see my Guide on installing...
[GUIDE] How to Root - Insignia Flex 8" NS-14T002