Thanks for clarifying further the problem.
Firstly, Scan your drive with Partition Wizard using the Partition Recovery tool. If Quick scanning the drive finds nothing then do the full scan which can take a long time. If it finds any of your partitions highlight each and double click. Does it show your files? If it does then put a check mark to only the partitions it finds that list files when you double click the partition found. Click Finish then Apply. If partition wizard does find any partitions please post a screenshot before attempting recovery.
Have you tried to mount the drive in linux. See this guide on using Parted Magic. You can get the iso here.
You may need to pull the data using Data Recovery Software such as Easeus Data Recovery. It allows up to 2GB free to see if the program works for you. It will scan the disk and look for your files.
Another option is the free PhotoRec but it recovers files with Generic names with the proper extensions. You would need to rename your files recovered. PhotoRec recovers files in real time to the folder you unzipped the program to. You would need at least the amount of free space on the hard drive as what data you are trying to recover. But, because the recovery is in realtime, you can pull the data using another external drive while the recovery is ongoing if you do not have the space. If you have another external with similar capacity start PhotoRec from a folder on that drive and the data will be recovered to it.