Which operating system is your desktop PC running ? Windows of some sort ?
In which case you could just attach the laptop drive (you will probably need an 2.5" to 3.5" adaptor) and use it as a second drive. Or you could make it the only drive in which case you will need to format and install an operating system on it.
Will warn you that laptop hard drives are not as fast as desktop ones generally so you might go down the first route of using it as a second drive if possible.
In which case you could just attach the laptop drive (you will probably need an 2.5" to 3.5" adaptor) and use it as a second drive. Or you could make it the only drive in which case you will need to format and install an operating system on it.
Will warn you that laptop hard drives are not as fast as desktop ones generally so you might go down the first route of using it as a second drive if possible.



