Hi Mike,
I have try it. It works, but not real perfect. Now I have to test it only one size 36×36 in the functions.php

Than I have download 2 photos (100KB and 4 MB) . I have deactivate all plugins.
But in the upload Folder I have again some diffrent Image sizes (but not more so many)
100KB File

4MB File

Perhaps it gives a further config file or I have done somthing wrong.

But this is okay for me, I understand now the function of the Mediacenter and download. The best is to make no changes in the config files and download rezize photo for my photo gallerys.

I have also test the both plugins “Resize Image After Upload” and “Imsanity”. If I will download photos for a Gallery I can activate one of this plugins for this Action and it help to save a lot of space and some filesizes

Regards
Markus

Hi Mike,
thank you for reply. Now I understand the architecture. If the upload picture has a size of 3 or 4 MB, it creates in the upload folder approx 20 Files with approx 8-10 MB (in the original size and smaller).

To reduce the space (MB) I must reduce fist the orignal photo on my wishing max size and resulotion and than upload (Because I have over 10.000 photos to migrate).

Only I need real a good and great photo I must upload it in a better quality.

Gives it a plugin to upload files with them I can choose the original photos, but by the upload it upload not the original photo, it should be reduce first the original photo to a size of (as example) 800×600 and 80% and this is the than the basic photo for the upload in the “wordpress/wp-content/uploads/* folder” and out this photo create WordPress the required smaller photos ?

Thanks and regards
Markus