HP EliteOne 800 G1 Maintenance & Service Manual page 86

4.
Lift the SSD to a 45-degree angle, and then pull it away to remove it from the socket.
To install the mSATA SSD, reverse the removal procedures.
NOTE:
mSATA SSD are designed with a notch to prevent incorrect insertion.
76 Chapter 5 Removal and Replacement Procedures All-in One (AIO) Chassis