Dont remove usb cable before updating finished
At the “Menu” screen, use the Control Wheel to select “Setup”, and then press the center button of the Control Wheel. At the “Setup” screen, use the Control Wheel to scroll to “USB Connection” and verify that “Mass Storage” is selected. Note: The LCD screen on the camera will turn off when it is connected to the computer. When the updater recognizes the camera connection, the following screen is displayed, and the camera screen displays the message, “Follow computer instructions.” 9. If the current version is a prior fw to the version after update, click “Next”. When the following screen is displayed, click “Run”.
At the Password prompt screen, enter the Name and Password for the administrative account, and then click “OK”. Connect the camera to your computer using the supplied USB cable. When the following screen is displayed, check the version number at the lower left.
To prevent this, make sure you delete all files with the extension *on the USB drive before updating an additional system.
While longtime Mac users probably know how to do this already, many new to OS X don’t, and though Windows has a little ‘safely eject disk’ dialog that pops-up from the Start bar, what are are Mac users to do?
If that’s the case, either wait until the task finishes, or quit out of the application in question.
You can also eject disks safely by selecting it within the Finder, and then going through the Finder menu: Additionally, there are standard ejection methods that use keyboard shortcuts, dragging the drive icons into the Trash, or even the old-fashioned eject key that persists on Apple Wireless keyboards and the few remaining Macs with Super Drives.
Note: this applies to all connected writeable drives, including external hard drives, USB thumb drives, backup disks, etc.
The potential for data loss due to inadequately removing a storage volume applies to each device, thus it’s best to get in the habit of manually starting the removal process yanking the attached storage device or USB cable out of a Mac.Now you can safely remove it from the Mac and you won’t get that alert dialog popping up.