Originally Posted by benee16
Yes my kindle fire hd 8.9 is rooted. I currently have version 8.4.9 software from amazon.
I too have had this low space problem after updating to 8.4.9. I was despaired but after searching the internet for 2/3 hours I found the solution. First thing you need to do is to get Titanium Backup from somewhere. It has the capacity to convert system app to user app and this will free up some ROM space so you can install Google Play afterward. Convert one by one some system apps that are not critical to Kindle's functioning, to user app. For example, you can convert Silk browser, Amazon Video, Amazon music, Kindle tutorial, Office Suite to user app. The moment you have above 20 MB free space in ROM you can install there Google Play. I am not sure if a free version of Titanium Backup have this functionality or not, I have installed a pro version of it. If free version is of no use then get a pro version from somewhere. I think you know where to get it from. Good Luck.