FFS 8.3 fails when copying TO Android devices. OK FROM device.

[jacksonmacd]

FFS 8.3 installed on Windows 10 computer, connecting to three different Android devices running various versions of Android.
Workflow is that I download a suite of files from the web to one of the Android devices, then use FFS to copy those files to the Windows PC. This step works fine. Next step is to copy the files onto the other two Android devices. I am able to open the correct respective folders on the source (Windows) and the destinations (Android), and perform the compare function. The correct files appear in the source and destination lists.

however, when I attempt to copy the files, FFS fails with a message that it could not copy the file (I don't recall the exact wording, but I think it mentioned insufficient permissions). Strange this is that if I use FFS to launch Windows Explorer on the respective source and destination folders, then it is able to successfully copy the files onto the Android devices. This behaviour is consistent on both Android devices.

Any idea how I can use just FFS to perform the update?