I need to transfer all the files apart from the OS from my laptop hard drive to a new 3.5inch hard drive in a new desktop, where I will install a new OS.
For a pretty big computer noob, what is the easiest way to do this?
You could get an external drive enclosure(not real expensive) for the laptop drive, remove the laptop drive, install it in the enclosure, and plug it into a usb on the pc.
With the power off, connect the laptop drive to either the adapter or directly to the motherboard of the new desktop. If using the adapter, turn on the power before powering up the computer.
Once inside windows open Windows Explorer and copy your files from the laptop drive (might be drive E: if you have a CD/DVD drive) to the C: drive of the new desktop. You might want to create a new folder called LAPTOP and put all the files in there to complet the process, and shut down the desktop. Now you can disconnect the laptop drive and put it back in the laptop.
Power up the desktop and organize them however you feel. Power up the laptop and delete them.