Gallery Assist (GA) installation.
- Download GA from Drupal Projects: Gallery Assist.
- Move the unpacked Gallery Assist folder (gallery_assist) to the place you have your contributed modules.
- Go to Administer > Modules, search in the list for the Gallery Assist entry, check to activate and save the settings.
The folder /sites/default/files/gallery_assist will be created.
At this moment Gallery Assist create for each user with permissions at /sites/default/files/gallery_assist a user folder called with the User-ID.
I recomende after install and before configure, to create a test gallery, so you have a nosion about default settings.