20 Most Recent Samsung CLX-3300 Multifunctional Laser Colour Printer SAMSUNG Questions & Answers

Google search your manufacturer make and model and the word manual. If one is available, you can find it in the search results.

Looks like this model does not have expandable memory from built-in 128Mb.

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open the tray where paper come out all the way and there is a switch on right hand needs to be reset