Lenovo ThinkServer RD550 - Manual (Page 140)

3. Pull the handle and carefully slide the bracket with the solid-state drive out of the front of the chassis.
Figure 102. Removing the bracket with the solid-state drive
4. Remove the five screws that secure the solid-state drive and the 3.5-inch to 2.5-inch drive adapter.
Then, remove the drive adapter with the solid-state drive from the bracket.
Figure 103. Removing the screws that secure the solid-state drive and the drive adapter
126 ThinkServer RD550 User Guide and Hardware Maintenance Manual