My Fire TV Stick used 25 GB of data over two days. I was able to determine this with the Stick's own data use info. It first came to my attention from my ISP's (Hughesnet) data use info that I had used up my 30gb high speed limit in the first couple days of the billing cycle. I couldn't figure out where it went until looking at the Fire TV Stick's data use info. I had streamed 4-5 hours of video over those two days but that couldn't possibly add up to 25 GB especially as Hughesnet has a video streaming setting that limits video to DVD quality. With the Fire TV Stick's data use interface you can set the day of the month to restart the data logging so it was easy to narrow down the specific days the high use occurred and that corresponds with the Hughesnet info. With Hughesnet I have 30 GB per month of highspeed internet and after 30GB it slows but still is able to stream lower quality video.
