I need to be able to edit and upload theme files directly to a sharepoint site, and according to the design manager instructions I can do this by mapping a network drive on my local computer to https://sitename.sharepoint.com/_catalogs/masterpage/
However when I try this I'm met with the following error:
The mapped network drive could not be created because the following error has occurred:
Access Denied. Before opening files in this location, you must first add the web site to your trusted sites list, browse to the web site, and select the option to login automatically.
I have done everything it suggests, but it did not fix the problem. I have also tried using the option 'Connect to a website that you can use to store your documents and pictures' but this gives me the following error:
The folder that you entered does not appear to be valid. Please choose another.
I have made sure my login credentials are 100% correct and have tried mapping the network drive on multiple devices and multiple connections - which leads me to belive there may be an issue with the way this sharepoint site has been set up?
Is there any other way I can easily access and modify the theme files? If not, how can I fix this network drive issue?