Adding a secondary hard drive is generally considered a basic upgrade procedure, but there are particular details to the process which can still trip up advanced users. One of the lesser known requirements of adding a new hard drive to a Windows machine is the need to initialize the disk.
If a disk is not initialized, it will show up in the system’s BIOS and in the Device Manager, but it will not be present in My Computer. Initialization can be performed through the Disk Management utility, which is easily launched by launching diskmgmt.msc from the Run command.
Once in the Disk Management utility, Windows will generally automatically recognize an uninitialized disk and you’ll be presented with an easy-to-follow wizard. If this does not happen, you can right-click on the uninitialized disk and simply click “Initialize Disk.”
Once the disk is initialized and formatting has completed, it will show up in My Computer and you’ll be able to use it normally.