WD Elements 1 TB Hard drive problems

If your hard drive is formatted to work on windows computers, you will only have read only access. Check the link below for the steps to format it again for Mac, this will of course will delete any files that you have inside so be sure to backup any important files that you have inside. You can also try downloading Paragon NTFS to have write access to the hard drive without having to change the format. 

http://wdc.custhelp.com/app/answers/detail/a_id/3865/session/L3RpbWUvMTM1NjYzNTg2MC9zaWQvNU80U3ZQZWw%3D