That depends on your system and your budget.
If this is a new issue, have you tried just doing a little disk maintenance?
If your system has an m2 slot and you can afford that, get that.
Consider getting an SSD. They are faster than a hard drive. Even a cheap one is still pretty fast. If you want a want a fast one, get a Samsung EVO lineup is very fast.
If you can't afford an SSD, consider a higher RPM HDD with a nice large buffer such as a WD Black.