Samsung SCX-8240NA-CAS - Manual (Page 40)

Media and tray_ 40
Optional high capacity feeder
You can increase the paper handling capacity of your machine by installing
an optional high capacity feeder. This tray holds up to 2,000 sheets of
paper.
The high capacity feeder can only hold A4 or letter-sized paper.
Using photographic paper or coated paper may cause problems, that
require repairs. Such repairs are not covered by the warranty or
service agreements.
1. Squeeze the lock lever on the handle and pull out the tray.
2. Flex and fan the edge of the paper stack to separate the pages before
loading papers.
3. Load paper with the print side facing up.
Align the paper and gently push it to the right side of the tray .
Otherwise, it could cause paper jams.