QNAP TS-253 Pro - 5.7 TS-251+, TS-251, TS-451+, TS-451, TS-251 A, TS-451 A

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b. For 2.5” HDDs/SSDs, only remove the bracket next to the 2.5” screw holes (they
are marked on the bottom of the tray.) Secure the three screws in the back of the
hard drive tray.
3. Insert the hard drive tray into the Turbo NAS all the way to the bottom and close the
case cover.