@Sebastian-Roth Yes, this is actually much easier. However, I have tried this before, but this did not work too.

I have currently 4 images in a storage (default) at location /images. I have added a new SSD disk and mounted (ext4) it to /images-fog. I then copied everything: cp -rp /images/* /images-fog. Then I changed the storage (default) path in the FOG web fronted to /images-fog. However, even after restarting the system, I was not able to download any image anymore. Am I missing something? I have followed the guide https://wiki.fogproject.org/wiki/index.php/Moving_your_images_directory/Adding_Storage_to_the_Images_directory. The only difference is that all permissions of /images-fog are 777 and root:root, because this was already the case of /images.

I would be greateful for any help.