I have an iPad4 running iOS 10.3.4. Recently I transferred some mp4 videos to my iPad from my Mac with a cable. I opened the finder on my mac, opened my iPad in the finder, used manage storage, and dragged and dropped my video files to my iPad. The videos appear in the Videos app on my iPad. Unfortunately, my mac crashed and I lost all my files. The videos I copied to my iPad were the last copy of them and I want to retrieve them. I tried connecting the iPad to my mac with the cable to copy these files back but I cannot. Does anyone know how to do it?