I'm using an AR16 to record files on a usb. I had no problem recording on it previously, but now when I press the record button, the button flashes three times and will not record like it did previously. The usb still has plenty of room on it, and I tried a new usb card to make sure it wasn't the card, yet the button still blinks three times. Can't find any previous answers that give me any insight into what is going on. Unfortunately I'm not too tech savvy with a/v and any help would be greatly appreciated!