airdrop cancled the copy
Why is AirDrop canceling the transfer from my iMac to my iPad? The file is an h.264 MPEG-4 movie (12.43 GB on disk) created from Media Encoder with the YouTube1080p Full settings, export from Premier. The file resides on an external production usb-3 hard drive. The 27" iMac is a 2019 3.6 GHz from 2019 with 40 gigs system and 500 gig storage memory (Mojave 10.14.6). My 2020 iPad Pro has at least 80 gigs of free space and a fresh reboot (iOS 15.6.1). After I drag-and-drop the icon (Mac to iPad), the sending progress is interrupted with "my name canceled the copy". That's it, no other information accompanies the error.
iMac 27″, macOS 10.14