Hey, give this a shot.
Go to Settings > Apps > Show system Apps (click on the 3 vertical dots upper right of screen) >
Samsung Accessory Service > Storage > Clear Data and Clear Cache.
I have factory reset the Gear S2. I deleted all or uninstalled all gear related apps on my S7 Edge inlcuding rolling back the gear wearable app. I cleared cache on the S7 edge. I installed the watch to my S9+ and all works fine. The problem is I need it to work on my wife's S7 edge. i reinstalled it to her phone and the transferring file.. please wait continues to flash. Sometimes for a quick second and disappears and then it comes back for a bit longer. All the while, the phone continues to get hotter and battery drains super fast.
The exact same thing started happening to me today.
I contacted Samsung Customer Service and the rep was able to resolve my issue.
He said that some updates might've gotten corrupted because they didn't install correctly.
That's why my phone was continually trying to transfer updates to my watch.
I had to reinstall the Wear App, which reinstalled the Plug In and Accessory Service.
This allowed 5 updates to get installed correctly and stop the transferring file notifications!
For good measure, I also restarted my phone and rebooted my watch during the process.