At some point in the recent upgrades (either the Spark firmware or the App - Andriod to both .18 and .22) the upload on the originals to the phone fails.

Starts downloading and after a short while you see the transfer rate drop to 0kb/s and it then stays there. Restarting everything has no effect.

Hi, Martin. If you fail to upgrade your spark with DJI GO 4, you can upgrade it through DJI Assistant 2. Here is the video for your reference:

Its not an upgrade issue. Its the download of the high resolution version of the videos that is not working