probably has been posted somewhere but thought I would toss my idea out . I save my videos in separate files on an external drive . I don't name them but simply sort them by location ,etc. The issue I was having would be two files with the same YUN0000023 number . My new system is to empty my sd cards but leave a file there numbered say YUN001000 . The Q will start with numbers sequentially from there and when I shoot at the same location the numbers won't be the same . May help some folks out .