I lost files when I do my pc factory reset how can find them?

@yohannes61 what type of files? It is possible that they got overwritten when you performed the factory reset. You need to tell us what OS you are using and what type of files you are looking for. Also tell us what you have tried to recover those files.

If you did a factory reset stop using the computer and pull the hard drive . Place it in an external enclosure or use some other method of connecting it. Connect to another computer and us a program called Zar X then run a drive recovery . You will end up with a lot of raw data but you will be able to recover what hasn't already been overwritten . You will require a large amount of storage as you will be recovering as much data as was originally on the drive including things you deleted in the past that weren't overwritten . hope this helps

Try with Recuva free software, it worked to me a couple times when i had to find an erased file, are the same guys who use CCleaner to fix registry issues on windows, also cleans innecessary files, freeing lots of space. https://www.piriform.com/recuva