I am having problems with a new Rockchip Ebook that I have purchased. I am unable to open files in Epub format, which the manual says is suuposed to work. I have even tried to use an SD card from an E Reader that I have already and those files will not open either. I have been trying for days to get this problem sorted and am getting just so frustrated. I have tried to google for an answer but to no avail. I have been able to download videos and other apps onto the Ebook, but that is not hat I purchased it for. If anyone can give me some assistance here I would be most grateful, When I put unit through laptop, everything comes up OK, just getting it to recognise the Ebooks is my big problem.