Replace: This option will overwrite all files on the target that are copied from the source folder.

There are differences between Replace and Merge: What is the difference between Replace and Merge

Merge, however, will combine the folders but keep the newer items if there are items with identical names. Stop will cancel this action and Replace will overwrite the existing files. The idea is that during the next step, we will merge them by moving one 1 into the same location (folder) as the other 1. So, to summarize, at the end of this step we have two different folders named 1 in two different locations. Then, I will rename 2 to 1 so we will have two 1 in two different locations.

Since their names are different, I will create a temporary folder and put 2 in this new folder. One of them is named 1 and the other is named 2. If you want to merge folders with different names, just create a temporary folder. You will need to have two folders with the same name so that you can merge them. Merging is a little different than replacing. Sometimes two folders may have files with identical names but have a different time associated with them. Sometimes you may have two different folders that share the same files or items along with their own files and folders. This can be an important step when organizing your folders. There may be times when you may want to combine the contents of two folders into a single folder.

Mac compare folders