Copy a huge amount of files

Need a software to copy huge amount of files with more than 100k files.I don’t know how it got that many but most likely system files and temp files. The Windows default copy paste having trouble doing it with reasons like file size too little or name too long or any other thing that windows says.
I am using the default Windows copier now, but is there something better?
I tried to look for Total Commander, but the site looks dodgy. I remember using teracopy a decade ago, but I think I read on Reddit that it’s not better than Windows’ default now. Some experts recommend GoodSync and another tool called ” Gs Richcopy 360 “. I searched both, look great, but the commercial.
any free tool that can also work with SharePoint online?