First, your PS3 is connected through a network that can access your PC or Mac. The software is then installed to your computer. When the program is launched, it establishes a connection to the PS3. Once this is done, there will be an icon on your PS3 for the Java PS3 media server software. When you click on it, you will be able to see the folders on your computer. The software scans all of your PC or Mac’s drives for media files.
When you want to download something from your computer to the PS3, the files are selected then you place them in a “shared folder” (which is used for sharing files between computers on a network). The file(s) are then copied directly to the PS3. Music files transfer fairly quickly, while bigger files (like movies) can take up to ten minutes to copy over to the PS3.