Unmount external memory card

[gord68]

I have an s21 ultra phone. I mounted the card in c slot and phone sees it and plays my music. I watched videos how to unmount it and I do not have the 3 dots on the storage screen to to get into the advanced function to allow unmount. Have to restart phone after I pull card out

[Ry-Galaxy]

When you're on the storage screen, click internal storage and see if it let's your swipe right to your SD card & see if the option appears there, hope this helps!

[AndrewL]

@gord68: I'm a little bit confused, as the Galaxy S21 Ultra does not support SD cards. Are you certain that the files you're accessing are stored on the card? If you swipe up from your Home screen and head to the Samsung folder > My Files, is the SD card showing up here? 

[JAMES4578]

Whilst recent  flagship devices do not have an SD card slot  it should be possible to use the cards via a USB C Adapter as shown here: