There is a right way and a wrong way to remove a SD card from the right side slot. The wrong way is to just pull it out. If you do this the computer will give you a message something like: UNSAFE DEVICE REMOVAL, followed by some additional explanation. They do refer to a green button. The right way is to use one of the File Manager options; for example, Click on Files > My Pictures. Notice in the upper left hand corner of the window there is [b]My Disk[/b] and below that is [b]SD/MMC[/b]. (The SD/MMC is only present if a card is inserted.) To the right of the [b]SD/MMC[/b] there is a green button. This is the green button you want to click before you remove the SD card. After you click it a message box will appear saying it is OK to remove the device. I guess the Linux users who have experience know how to do this with code. But I had always heard you're not supposed to understand it, that's why they call it CODE. It seems like this information would have been presented in the owners/user manual someplace.