@haantje72: First thanks for your feedback.
>Now when my folder has subfolders i get the tree displayed the folder but when i want to select subfolders i get the message not found.. maybe a SS3.2 problem?
Just to make sure. You are talking about the dropdown box to choose an image folder of a Foldergallery page right? Sounds like your filesystem is not synchronized. Go to the SilverStripe "Files" tab and press the "Sync files" button - then try again.
Tested with SS 3.0.2 and latest Firefox, no issues on my side (could select folder "4legs" from "/assets/cwsoft-foldergallery/2012/animals/4legs".
>Another point wich could maybe be better for the picturealbum is that it resizes the large picture to! I have several pictures sized between 10 and 25MB. It takes sometimes a lot of time to load the popup. If the image is resized automaticly on first load of the picture (or all images on first load of the album wich makes first time page-opening slow, but is better), makes the module much more usable.
I normally resize all my images to the maximum "popup-size" (e.g. 640x480) size and reduce the screen resolution (e.g. 96 dpi for screens and low file size and loading time) BEFORE uploading via FTP, using the batch mode of my preferred Photo tool (e.g. Gimp or PSE). If you do not have a photo editing tool, you could use freeware tools like Photo Resizer to acomplish this task.
Guess if you have lots of images (10-30MB) to be resized by PHP on your server, it will need several page loads to resize all images due to PHP script executing time and/or memory limits (check your php.ini). However, I will think about this option and check if it makes sense to implement it with a future version.
>A lot of users use ss for private websites. Maybe in the cms there could be a checkbox available for => downloadable and in the template a download>>> button (or text) for sharing. So the user can choose to let the pictures be downloadable or not.
Not quite sure I understand what you are after. Do you want to download single images or all images of a specificy album and/or all images at once? A "download image link" could easily be added to the template, pointing to a download page. To be honest, I somewhat doubt that this feature is really usefull for a simple gallery module.