Buffalo HD-QLSU2R5 DriveStation Quad Manuel D'utilisation page 13

Replacing a Hard Drive
Install a new hard drive by doing the same steps
in reverse order:
Slide the new hard drive into the case.
With the lock mechanism open for the last bit,
slide the drive into place.
Close the lock mechanism. It will "click" as it
engages.
Replace the front cover.
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