Hard Drive Upgrades We can upgrade the hard drive in your computer. We can add a second hard drive or install a large hard drive to replace your present one. We can even transfer your data from the old drive to the new drive. There are some considerations that we may discuss with you. For instance, it is important to know if you have a CD ROM drive and what type of interface it uses because some CD ROM drives run off the hard drive controller and you can only have 2 drives total on a controller. We may need to add a secondary controller in many cases. In the case of hard drives over 528 MB, a seconday controller is usually the best choice although it adds to the cost. There are reasons that adding an old hard drive to an IDE hard drive may make your system inefficient. There are jumpers to set and partitioning and formatting to install a new drive. There is also the data from your old drive. Do you have backups?