Lost Partition of my Hard Disk

Hi,
a while ago i was trying to copy documents from my hard disk but it wouldn't
so i searched online and i found that i can just partition the hard disk one for IOS and one for Android
eventually when i did it everything on my hard disk disappeared!
so is there a way to get it back?
i hope somebody would help me because the files are very valuable to me.

Unfortunately, the way most “file recovery” utilities work is to reallocate the disk sectors that are indicated to have previously belonged to a file as indicated by what appears to have been a directory block in reformatted partition. That does not mean that the disk sectors referred to weren't modified in some way in the interim. If some other file or files used these sectors in the interim, you are pretty much out of luck.
The best way to “recover” your PDF files is to access those files from you backup media. You do backup your system on a fairly regular basis, don't you?
          - Dov

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