How to unlock a locked read-only .txt
On my Macbook Pro I'm trying to edit a .txt file inside a device/external hard drive(it's under the Devices tab in finder) I've tried get info, looked under general and the Locked box was unchecked, I looked under Sharing & Permissions and under Privilege it says Read & Write by my name, but it also says You can only read under the tab. I open the .txt file and I click the unlock option, and a message comes up and says: The file "Plugins.txt" is on a read-only volume and cannot be unlocked. Is there any way I can fix this to edit the file?
Mac Pro, OS X Mountain Lion (10.8.2)