I'm not sure if it's a lot of files, or a large size that triggers this warning. The warning claims the internet connection is not fast enough, and also suggests moving to spot with better signal, erroneously assuming it's a wifi or cell connection even if it is hardwired.
The warning is incorrect.
For large transfers, it come up on any internet connection I've tested, including very fast home internet (300mb/s down) and very fast commercial dual 10gigabit fiber connections at a film post production facility in NYC.
It looks sloppy to be sending my clients big files, and have them see this warning, when they connect from a state of the art, top 0.01% internet connection designed specifically for downloading large files quickly.
