Ejecting your Android's SD card or freeing it from its USB tether can corrupt data currently transferring to your device's memory card. While a green check in Windows taskbar clears your to unplug your Android without ejecting it, redundancy errors can stall the transfer of data between your Android's storage and your computer. And determining when you're clear to remove your Android's SD card from the device is even more dubious, since many of your Android's apps and services will likely access and store data on the card. Terminate all transfers to your Droid's SD card before ejecting the media from your Droid device.
Tap on your Droid's "Menu" button and then select the "Settings" icon from the menu options.
Tap "Storage" in the Settings menu. Tap "Unmount SD Card" in the Storage menu to disable your Android device's memory card.
Remove the SD card from your Android device.
Click on the "Libraries" tile in Windows' taskbar or open any folder on your computer.
Click on the "Computer" heading in the folder's sidebar. Right-click on your Droid device's storage icon in the Computer folder and then select the "Eject" option from its context menu.
Disconnect your Android device from your computer.
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