odrive will not unsync when a folder or sub-folder or file is read only. Read only files can be dealt with by opening properties, but to clear the read only attribute for a folder or sub-folder one needs to us the command prompt attrib command. Like this:
attrib -R d:[userid][path. In double quotes if spaces][top folder name in double quotes if spaces]*.* /S /D
This will clear the read only attribute on all folders and files under the top folder, including the top folder.
I notice a thread in the forum where odrive did not know this.
So odrive should document this.
Better still, when a read only is encountered, odrive unsync should give the option to ignore the read only for this file/folder or for all files/folders and then continue and delete the files/folders.
Even better yet, odrive should just automatically ignore the read only attribute. After all, the user want to unsync and the read only does not really apply in this case.
And windows 10 seems to set the read only attribute a lot.