QNAP TS-251 User Manual

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7. Reattach the hard drive cage to the NAS. Please ensure that it correctly plugs into the
slot.
8. Secure the hard drive cage by fastening the four inner screws (for the 4-bay NAS,
please fasten the two additional top screws.) Then reattach the case cover of the NAS
by gently sliding it back together.
9. Fasten the two/four screws onto the rear of the NAS.
10. Reinsert your hard drives to the NAS.
11. Connect the power adaptor and cables back to the NAS.
12. To check that the memory module is recognized by the NAS, power up the NAS and
login the web interface as an administrator. Go to “System Status”>“System
Information” and check the total memory in “Hardware Information”.
5.8 IS-453S
1. Loosen the four screws on the bottom and the two screws on the rear panel of the NAS
with a Phillips screwdriver and lift the bottom off.

QNAP TS-251 Specifications

General

Flash Memory	512MB
Drive Bays	2
Hot Swappable Drive	Yes
Power Supply	65W adapter, 100-240V
Form Factor	Tower
Memory	1GB DDR3L RAM (expandable up to 8GB)
Network	2 x Gigabit RJ-45 Ethernet port
USB Ports	2 x USB 3.0, 2 x USB 2.0
HDMI Output	1
Weight	1.28 kg
Operating System	QTS
Dimensions	168 x 102 x 225 mm (6.61 x 4.02 x 8.86 inches)