What are thumbnails in Disk Cleanup?

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Tags

1. #thumbnails
2. #these
3. #choice
4. #original
5. #windows
6. #containing
7. #images
8. #cleanup
9. #little
10. #small
11. #sized
12. #copies
13. #remove
14. #those
15. #choose
16. #folder
17. #files
18. #image
19. #saves
20. #space