Hello. I have an older emachine with an 20gb hard drive. I would like to add that hard drive to my HP newer computer by pluging it into the slave connector next to the hard drive. Would it show up as a "X" drive so that I can access it through My Computer? Thank you.:confused:

Depends on whether your new system supports IDE drives, instead of SATA drives. You would also need to jumper the drive to be a secondary drive.