A:Answer you are trying to transfer to much at one time, this happened to me to. try only 50 or less at a time and it will work alot better. I never heard of charging a flash drive either, but this one you do. You can charge it with your phone cord. To check the charge, on the side of it it has a light on it. A high charge it is green, getting low, yellow, low red. Or you can check it on your device, in the upper left hand corner when you have it open, click the 3 or 4 line thing, and it will open choices to check the levels of everything on it. Hope this helps. If not it does have a web site.