Deleted Volume of external hard drive by mistake.

I was trying to clean the volume of the main drive of my laptop and I think by mistake I deleted the volume of my external 1 TB Lacie hard drive. As soon as I found out I was deleting the volume ( a minute or so ), I shut down my laptop.
When I rebooted somehow I am no longer able to retrieve any files of the external drive. All the files are very important since it represents months of work. I tried to use the Disk Utility to repair the drive but it did not find any problems. But now all my files are gone from that external drive.
What can I do at this point? Any help will be greatly appreciated.

Hi Figgy, Welcome to Apple Discussions.
Unfortunately, it takes only a "minute or so" to erase a drive.
Your best shot at recovery is Prosoft Data Rescue. There is a free trial to see if it can recover what you need. But don't do another process on that drive until you've downloaded and run it.
-mj
[email protected]

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