Have assigning a letter to external hard drive removed all data?


I have a WD external hard drive that I have previously used with Linux. That Linux machine is long gone, but I now wanted to access the files with a windows10 machine. However, the hard drive did not show up in explorer. I then connected it to a Mac and the files showed up there. It identified it as formatted to Fat32. I thought that that should be compatible with windows, googled a bit and then followed this guide: http://www.makeuseof.com/tag/external-drive-not-recognized-this-is-how-to-fix-it-in-windows/

I followed the steps, assigned a letter, and came to the part on formating. Obviously, I did not want to format the drive, so I cancelled and went back to the mac to transfer the files, but the drive is no longer recognised and an error is given when I try to access it. My machines thinks it is now in fat16.

Are the files lost forever? Is there something I can do to get the files back. I have tried googling for answers, but I have not found a solution. Thanks for any help I can get!