Samsung 1000P User Manual (en)

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  To disconnect the frame from a PC  
Make sure to end the connection properly to prevent damage to the frame or your data.
 on the Windows Taskbar.
Click the pop-up message.
Safely remove USB Mass Storage Device - Drive(G:) 
Disconnect the USB cable only when the message says that it is safe to remove the hardware.
Do not disconnect the USB cable while the files are being copied, as this could result in loss of data or damage to the frame.
The connection will not end if you have frame files open on the PC. Close all frame files and try again.
Transfer files from a PC  (continued)