I have an old WD external hard drive(500GB). I can’t find the exact name of the model. On the serial number label, it seems like WD5000E035. Previously it worked great for my old computer which runs on Window XP. Recently I bought an new computer which runs on Window 7. The new computer could not read the hard drive and gave me an alert which asks me to format the drive. I have a lot of data on the drive. I wonder how I can transfer the data to my new computer. Thanks.