That one file has been downloading for close to 23 hrs and just keeps starting over. I have tried all the suggested stuff from deleting it, running as admin, command prompt, to using netlimiter. After reading many post from all over the internet I know 100% I am not the only one with this problem. It is for sure an issue with the launcher and how it reads files. Guess there is nothing I can do but sit and wait till next patch, and hopefully it is soon. In the meantime I wanted to try a full completion on the witcher and rdr2.
Try looking in the thread update stuck in a loop 1.8.2
There’s a tip to change network settings speed to 10mps full duplex which worked for me. Hope it helps, if it does change back afterwards to previous setting