I'm new to Elementary OS, I'm having an issue with the folders. The folders have lock icons and I can't edit or delete or modify any of the files. These are from the Disk partitions, however, I'm able to access files and folders from the user folders like Videos, Documents, Photos, Downloads, etc.
When I right click and see the folder permissions, it shows as 777 for the user 'sudeep', which is me.
This has started happening from yesterday after installing a system update. I'm not sure what to do now. I've tried several methods such as chmod x+wr, chwon, sudo su, etc. but nothing has worked.