How do get my hard drive to work?

I just bought an external Lenovo hard drive and I wanted to start using it.

So I plugged it into my Macbook and tried to drag and drop my items into it.
But it doesn't allow me to!

It's like as if it's locked and I can't seem to unlock it

How do I solve this problem?

Please CONTACT CUSTOMER SUPPORT @ +1^800^249^9713

Probably that hard disk came from Lenovo with format on it for Windows file systems. Check that with Lenovo and how to change it to the system that a MacOS machine can use.
Best guess from no model numbers on anything.