Internal storage space on a Motorola android phone I only have 6 games downloaded and moved to my SD card but my internal storage is running how can I find out why that is? And how can I fix the problem?
Firstly, what's the size of your device's internal storage, and what are these games you've downloaded? Because if you have 4GB of storage and downloaded something like Dead Trigger it would be obvious that you would run out of storage space. 

If it's still unclear why you ran out of storage, I would recommend two steps for you: 


Download file manager from play store (I personally use FX Explorer) and search for large files you've in downloads folder (or any other folders you could possibly junk). 
Download  SD Maid and let it optimize storage for you. 


That should help in most cases, if not, let me know ;)