Experienced TYPO3 Integrators and Developers
Tested on 6.2 with news 3.2.x (2900 news records and 8 GB of files) and on 7.6 with news 4.3.x, feel free to adapt to your needs.
PLEASE make a backup of the database and the folder uploads/tx_news first!
Run the migration from CLI:
typo3/cli_dispatch.phpsh extbase mediamigrate:mediamigrate --pid PID_WITH_NEWS_RECORDS --folder fileadmin/WHATEVER
This command copies the files from uploads/tx_news to the folder and creates FAL references for the media and related file elements of a news record.
After checking the migration you can delete the migrated files and the old references:
typo3/cli_dispatch.phpsh extbase mediamigrate:mediadelete --pid PID_WITH_NEWS_RECORDS
Then you will have to enter 1, if you want to proceed.
All activities are logged in typo3temp/logs/CitkoNewsMediamigrate.log.
That's it. The extension fits our purpose, feel free to modify it!
After migration delete the extension from your system and update your reference index.
Big thanks to my company Citkomm for letting me publish this.