I've just come back from a holiday in Portugal and I've recorded on my iphone over 500 videos. However, when I attempt to transfer some of the videos from my phone onto my secondary HDD I get the error 'The parameter is incorrect' and it then does not allow me to copy/paste of my phone. Also, when I attempt to watch these videos through the Windows 10 Photo App it says the format is unsupported, although I have already been able to transfer videos of the same format. These videos I cannot copy do however play in Quicktime player, so I'm unsure of the problem. Thanks for the help in advance!