What does it mean when your SD card is unmounted?

Related questions

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2. What are the advantages and disadvantages of a memory stick?
3. Can SD cards be reused?
4. Why is my SD card not working?
5. What is difference between SD card and memory card?
6. Is SD card a memory card?
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Tags

1. #again
2. #device
3. #remove
4. #phone
5. #before
6. #unmounted
7. #means
8. #reader
9. #everything
10. #whatever
11. #another
12. #mount