Dell XPS 15 Service Manual page 34

3 Turn the solid-state drive assembly over, then remove the screw (M2x2) that
secures the solid-state drive to the solid-state drive bracket.
Figure 10. Removing the solid-state drive bracket
1 solid-state drive bracket
3 solid-state drive
4 Lift the solid-state drive off the solid-state drive bracket.
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2 screw