MSI PROBOX23 - Manual (Page 12)

 mSATA Card
Important
The mSATA card has only one notch and will only fit in the right direction.
Step 1. Rolling off the screw on the fixing bolt.
Step 2. Insert the mSATA card into the slot with
45° angle. Then push it in until the golden finger
on the card is deeply inserted.
Step 3. Press the mSATA card down and then
lock the screw.
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