Is the drive in a condition in which it can be read at all? In that case, you can use software recovery tools by companies like EaseUS and Recuva.
If it can't be physically read, the possible solution becomes far more expensive. It means a professional data recovery firm, that uses a specialized lab and equipment designed for this purpose and can easily run you over $1000 (with no guarantee of success).
The only time to dependably save data is before you lose it. A regular backup plan is a basic part of responsible PC ownership, no different than changing the air filter in your furnace or the oil in your car.