Gents, this is insane. My 2 TB external drive (housed in a macally case, exFAT formatted) has suddenly become read only. I cannot delete any files. I cannot do anything with the drive. It had been fine for months on end. Now, I spent yesterday combing the net for solutions and unfortunately, every solution I find does not work for me. One case in point is that when I get into the Properties of the drive, I have no SECURITY tab. Why? I have no idea. But most soltuions involve that tab and I don't have it. Other solutions involve getting into Disk management, but again, i am missing things that I see in the instructions. I'm running Windows 7 Pro. To say that this is annoying is an understatement. I am crippled until I can fix this. Registry editing is NOT my thing. I find it to be extremely difficult since I am dyslexic. There has got to be a solution here. Can anyone help me? Clearly I need to find out why I have no Security Tab on my Properties when it comes up!