So, I purchased a second R4, not for myself, but for a family friend's kids. From the same site that sold me mine, which works fine. I inserted the R4 into the SD adapter, and into the USB port. My OS recognized everything, yadda yadda. Now when I go to drag the firmware into the R4, it tells me that the disc is write protected, or something like that. I didn't encounter this with my own R4, so I thought this was odd. I tried to format the R4, it it wouldn't allow it. The problem is with the adapter itself, as I was able to install the firmware and games using my adapter just fine. I've read around that there's supposed to be some "lock" switch next to the adapter, which is no where to be seen on either of these adapters. So, what do I do now? They paid their good money for the R4, and the adapter is disk protected. It works, I mean, as I said, my OS recognizes the R4. But I can't do anything else on it. Can anyone help?