I am selling my SSD as I no longer use it anymore. I would like to delete everything off it except Windows 10 as I can sell it for more with Windows 10 on it. Can anyone advise what do ?
You cannot 'sell' your installation of Windows 10. The activation of that copy is locked to your motherboard, so if the SSD is installed into another computer it will trip the activation (unless the destination system already has a Windows 10 activation tied to it, but may still necessitate a Windows reload).
Selling it with a configured Windows OS on it is not guaranteed to boot anyway. If you are selling your Windows license (which you would have to do to be legal), then sell an installation media with a blank SSD.
Thanks for the reply. Technically it’s a Windows 7 full copy but was upgraded to windows 10 when you could do it free. I have the product key. I don’t use anything on it so don’t need to copy anything off the SSD just a full reset except Windows.