Lenovo ThinkStation P520 Hardware Maintenance Manual page 150

c. Loosen the screw that secures the M.2 solid-state drive. Then, remove the M.2 solid-state drive out
of the slot at an angle of about 20 degrees.
Note: Do not touch the circuit board of the M.2 solid-state drive.
Figure 83. Removing the M.2 solid-state drive
3. To install the M.2 solid-state drive, do the following:
a. Insert the new M.2 solid-state drive into the slot at an angle of about 20 degrees. Pivot the M.2 solid-
state drive downward. Then, tighten the screw to secure the M.2 solid-state drive.
Figure 84. Installing the M.2 solid-state drive
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P520 Hardware Maintenance Manual