Why not use the partion and format tools that Windows offers? I can't be specific here as I can't find which OS.
I have a 3.5" samsung hdd from a computer that was dead and converted it to a external hard drive but when i tried to format with Easus partition software i got an error message that the format could not be completed and a second later a message that the USB storage driver could not be detected since then i have tried many ways to connect the external hdd but it's not recognized since then. Any ideas of what could it be and how could i solve it. Thanks in advance.