QNAP TS-401T Turbo Server User Manual page 11

3. Turn around the disk tray. Make sure the hard disk screw holes match the
holes of the disk tray. Fasten the flat head screws to lock the disk as
indicated below.
4. When finished, open the tray cover of TS-401T and insert the disk to the
server. Push the disk towards the end until it is locked. Note that all disks
should be inserted in order from top to bottom (HDD1~HDD4).
HDD 1
HDD 2
HDD 3
HDD 4
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