Can't transfer data to my 3TB My Book Live Hard Drive Any thoughts?

Hello,

I am having an issue with my second of two 3 TB My Book Live Hard Drive

The First one has no issues transferring data to and from hard drives

The Second one has an issue where I can not transfer data on to the hard drive and also transfer it off the hard drive

I can play the data off my wireless media player but that’s it for now.

Also I can not update my firmware aswell if that matters

Any ideas would be great

Thanks

Kane