Here is more info.
Both ports are clean and the USB-C to Lightning cable is new.
I’m running macOS Big Sur, version 11.7.10.
I’m using Photos app on my phone. I first tried to download a video to Dropbox using my phone’s cellular service (no cable). After quite a while of the phone showing message it was preparing file, it then popped up with a message saying not enough storage space. I should have taken a screenshot of it but forgot.
Still using cellular service, within Dropbox app this time, I tried uploading the file from Photos app on phone and no indication anything was happening. It may have been also trying to prepare the file. I stopped it as I had to get some sleep.
This morning I thought I would try using a cable and just download it to my MacBook.
I’ve downloaded 1+ hour long videos before to Dropbox (using cellular) and haven’t had this issue before. I only have used my cellular service and the Photos app on my phone. I’m not sure why I’m having an issue with this video. I may try another to see if perhaps it’s just this file. The only difference I can think of is that I had upgraded to iOS 17.5.1 and it seemed to compress my storage. After that upgrade, I had a whole lot more available space. Those 1+ hour long videos I had downloaded was before that upgrade. I can’t think of anything else that has changed.
I will reboot my MacBook and do the forced restart on my phone to see if that helps.
Please let me know if you need more info.
Thanks for your help.