Could someone for the love of god DEFINE what exactly is the difference between a LIBRARY, A FOLDER, A CATALOGUE, A COLLECTION, A QUICK COLLECTION AND WHETHER YOU CAN IMPORT OR EXPORT INTO ALL OF THE ABOVE???
Saty, a newbie
Catalog is the newer name for Library. Its the database you store your images into.
A collection is just that, a group of images within that catalog. Think of a playlist in iTunes. They are pointers to images. You can have one image that appears in a dozen collections.
A Quick Collection is just that, a temporary collection you use as you move around your catalog and want to collect images that you may print, or upload to a web gallery or whatever. Ultimately, if you don't want this to be temporary, you make a collection.
You can export anything you can select so yes, you could click on a Collection called "Dogs" and export all those images.
A folder is a folder. You got em on your computer right? You have images inside them. LR just lists those folders of imported images within your catalog so you can see the images where they reside on the HD.