Since yesterdays update to my Ubuntu 18.04 desktop system, all the NTFS volumes have become read-only. I haven't had time to research this fully yet; just seeing if anyone else is having the same problem. I see many old threads on this topic, but my system has been running perfectly until yesterday and there seem to be no new posts.
Permissions on those volumes looks good, but attempting to delete files or folders from Nemo fails and using rm in terminal line gives the message "read-only file system".
The system dual-boots with Windows 10 (which I use only rarely) and Windows now won't start, which may or not be related.