Software Programs: Some programs you have on your PC could also create duplicate files.Windows does this so that the files can be easily restored/replaced should a virus/malware corrupt/delete them.
To protect your PC (and files) against certain types of malware, the Windows OS automatically creates a duplicate of some files and saves them in a private place on your computer. They (Windows PCs) build-up redundant duplicate files and saves them up in your hard disk. Automatic OS Build-up: Sometimes it’s your PC.It could be unintentional but let’s face it: you are the reason you have duplicate files on your PC. Sometimes, users also assign a file the same name they’ve previously given a dissimilar file/document. Perhaps you downloaded an image of your friend twice or you clicked the download button twice when you tried to save a file from a webpage. User: Yes, it’s possible you put them there.
