I purchased maps from the marketplace, and I continued to download the maps after using the minecoins, after it's buffering, it told me "you do not have enough space on your device to download [enter map name here] " although I had 5 GB and 4.8 GB on both the device and microsd card. It asked for only 150 MB. So yes I did have much more space than needed, but even then I couldn't, at first I was able to update or buy worlds but now I can't. If I would press the download button again the same message would pop up but now the needed space is multiplied depending on how many times you press the download button. Also the name would repeat based on how many times you pressed.