Replacing existent images

[penelope79]

Hi! I searched the forums but I didn't find anything that matched my request. I'd like to know if there is any way to replace/re-upload huge number of existent images. For example, I need to change filenames in different folders and, in others, I need to re-upload the same images with others identical but with higher quality. Is there a way to do that quickly and without deleting all the images and re-uploading them again, even if with Batch? I hope it's clear enough! 

[penelope79]

Does anyone know any solution?