Unless you have a laptop, -open your computer -locate the Hard Disk (I guess you know what it looks like) -check the two cables it is attached with -signal-power -check that you have the same connectors somewhere on the drive you just opened, possibly you'll have to remove more stuffs. Hopefully it will be SATA connectors (small, 1 or 2 centimeters wide), so you won't have to bother about Master/Slave jumpers settings. -check that you have two of the same cables that you can attach from your motherboard to your external HDD, it is possible that you use the ones from your optical drive. -turn on the PC and see what BIOS detects, then what Windows sees. -copy your stuff anywhere you can. -Good luck.