Hello, so I have put my self in a pickle. I used a hdd from a old laptop (Windows 7) as an external memory drive to save and back up lots of files. I was bored so I fixed the old laptop and tried putting the original hdd back. There was issues right away so the laptop tried to fix disk errors without affecting files. This led to not able to boot up anymore. I removed the hdd and plugged it via usb into my current laptop (Windows 10). All the files that were added externally are gone. Still contains files from original laptop. Is there any chance those files are still somewhere ? Any advice on how to recover them? I have looked at some software recovery programs like Testdisk, but I rather get some advice before I start attempting things.