For all this a backup of what you need and a fresh firmware install can solve a lot of problems and give you some speed back too.Best reason is if you want to sell your box after extensive use and including quite a few personal things on it.Everything worked fine except that some programs I installed caused crashes at times with no reason I could find.Plus Kodi would often take forever and a bit more to get through the menus and start things.As I only have the standard 2/16 box I will focus only on that model but the procedure is the same for the others. Don't just download the image for the firmware alone as it won't work.A double click on the folder symbol next to the name will open the files contained within. If you have not done so then now is the best time to consider a backup!!!!
There is none, which means as a normal guy you can only download files of up to about 200mb, everything bigger gives you an error message telling you to use their downloader tool - which needs a registered login as well.
I assume you installed a download manager of your choosing and the browser extension and script.
In the Baidu account you see a normal folder structure as you would with any filemanager.
After some digging on the web I found the guys behind the X96 are actually nice enough to provide more or less regular updates for their boxes, even for the new model with dual Wi Fi and Bluetooth 4.0.
Only problem with these updates is that they come without any instructions and are located on a chinese file hosting and website service - pan.