You're right, and it is really frustrating, especially as it was working fine at first!
To make the footage editable in other programs (for you Premiere Pro, for me Vegas Pro) you need this:
It's another step which shouldn't be necessary, but at least it's simple and works fine.
I don't know what you mean that "...the files remain on your phone as data or cookies or whatever..."?
Deleted is deleted, right?
I'll certainly try deleting and re-installing the app, but I seem to remember already doing this, not sure now, I have tried so many things...!
Thanks for the help.
I had the same problem on my S7. Had massive space on internal and external memory, but couldn't save the files from the gear 360 (2016) camera to my phone via bt or wifi. Then I came across another forum, stating that people couldn't save pictures anymore on their Samsung phone with that same message "not enough storage". It seems that the data or cache memory of the "Gallery" app needed to be cleared.
Go to Setting,
then search "Gallery",
and clear Data.
Don't worry, it wont delete photo' or videos. Did that, and the downloading to the phone worked again.
Hope this helps for you all.