When uploading a file that already exists in a folder in media archive you get the option to "Overwrite" or "Cancel".
If you want to replace a lot of files you will get the question for each file, which is very time consuming.
I would prefer if there were an option to "Overwrite all" or "Skip all".
I just gave up uploading av folder with 1000 images where half om them was supposed to be replaced.