The question that you need to answer is, "What SPECIFICALLY are my data recovery needs in THS situation?
I have a damaged backup drive. This is a problem because all of my video from a very important event is on that drive. What I know right now is that the drive was dropped and will not power on. It is not impossible that the data on that drive is now corrupt as a result of the drop- it occurred while the drive was on. I need to ask some searching questions of real experts in order to know what my next steps need to be. Umm... Col???
That is one kind of problem.
I accidentally deleted important files (or the files were deleted by someone else. There's another kind of recovery problem. In that case, there are commercial products available that *may* recover those files. The good news is that better vendors have a trialware version that you can download and check to see if your files are recoverable... before you drop around $100 on the software.
The volume is corrupt or logically damaged. Tougher to manage but not entirely a lost cause. A good starter question is, "How important is that data anyway?" Some recovery tools might be able to overcome the problem- and the use of those tools is free until you actually want to recover something. Forensic data recovery is extremely expensive but well worth it for critical data.
So what is your need?