Samsung CLX-3305W-XPE - Manual (Page 74)

Using USB memory device
74 2. Menu Overview and Basic Setup
4 Press (Stop/Clear) to return to ready mode.
Viewing the USB memory status
You can check the amount of memory space available for scanning and saving
documents.
1 Insert a USB memory device into the USB memory port on your machine,
and then press Direct USB.
2 Select Check Space .
3 The available memory space appears on the display.
4 Press (Stop/Clear) to return to ready mode.