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Rectangular white four-bay desktop NAS unit with front drive trays and status LEDs

Qnap

Qnap TS-433-4G-US 4-Bay Desktop NAS 4GB ARM Cortex-A55 2.0GHz

SKU CH-773W-21EX7 MPN TS-433-4G-US

Four-bay desktop NAS with a quad-core ARM Cortex-A55 2.0 GHz processor, 4 GB DDR4, one 2.5 GbE and one 1 GbE port, supporting up to 88 TB across RAID 0, 1, 5, 6, 10 or JBOD

  • TypeDesktop NAS
  • Ports1 x 1GbE / 1 x 2.5GbE / 1 x USB 3.2 Gen 1 / 2 x USB 2.0
  • Port RJ-451 x 1G Ethernet | 1 x 2.5G Ethernet
  • Port USB1 x USB3.2 Gen1 and 2 x USB2.0
  • HDD InterfaceSerial ATA
  • Form Factor4-Bay

Form Factor 4-Bay

Installed Memory 4GB

  • Quad-core ARM Cortex-A55 at 2.0 GHz handles everyday NAS tasks smoothly
  • 5 GbE plus 1 GbE ports deliver faster wired transfers for large media files
  • 4 GB DDR4 memory supports multitasking and on-the-fly transcoding without bottlenecks
  • Four SATA bays accept 3.5" HDDs or 2.5" SSDs for up to 88 TB total capacity
  • QTS 5.0.1 adds snapshot protection, AI face recognition and remote cloud access

Compact four-bay NAS for home cloud storage

The Qnap TS-433-4G-US is a diskless desktop NAS with four SATA drive bays, an ARM Cortex-A55 quad-core processor at 2.0GHz and 4GB of DDR4 memory. It runs QTS 5.0.1 and provides one 2.5GbE port, one 1GbE port, one USB 3.2 Gen 1 port and two USB 2.0 ports for backup or expansion. The unit includes a 90W power adapter and supports RAID 0, 1, 5, 6, 10, JBOD and single-drive modes.

Households wanting centralised media and backup

Families and home-office users who need a private cloud for photos, videos and documents will appreciate the built-in NPU for AI face recognition, snapshot protection and myQNAPcloud remote access. The 4GB memory is soldered and cannot be upgraded, so buyers who anticipate heavier virtualisation or database workloads should look elsewhere. The two Ethernet ports limit link aggregation to 2.5GbE and 1GbE speeds.

Four SATA bays with 88TB maximum capacity

The chassis accepts four 3.5-inch or 2.5-inch SATA hard drives or SSDs, delivering up to 88TB of raw storage when populated with the largest supported drives. This bay count and capacity ceiling determine whether the TS-433-4G-US can hold your current dataset and planned growth without requiring a larger enclosure.

Highlights

  • Quad-core ARM Cortex-A55 at 2.0 GHz handles everyday NAS tasks smoothly
  • 5 GbE plus 1 GbE ports deliver faster wired transfers for large media files
  • 4 GB DDR4 memory supports multitasking and on-the-fly transcoding without bottlenecks
  • Four SATA bays accept 3.5" HDDs or 2.5" SSDs for up to 88 TB total capacity
  • QTS 5.0.1 adds snapshot protection, AI face recognition and remote cloud access

Specifications

BrandQNAP
SeriesTS-433 4-Bay
ModelTS-433-4G-US
TypeDesktop NAS
Ports1 x 1GbE / 1 x 2.5GbE / 1 x USB 3.2 Gen 1 / 2 x USB 2.0
Port RJ-451 x 1G Ethernet | 1 x 2.5G Ethernet
Port USB1 x USB3.2 Gen1 and 2 x USB2.0
HDD InterfaceSerial ATA
Form Factor4-Bay
Operating SystemQTS 5.0.1
ProcessorARM 4-core Cortex-A55 2.0GHz
Installed Memory4GB
Max Memory Capacity4GB
Included HDD Capacity4 TB Mechanical Hard Disk
Max Capacity88TB
RAIDRAID 0, 1, 10, 5, 6, JBOD, Single
Drive Compatibility3.5" SATA HDD
2.5" SATA HDD
2.5" SATA SSD
Rotational Speed7200RPM
LEDsSystem Status, LAN, USB, HDD1-4
PowerPower Supply Unit
90W adapter (12VDC), 100-240VAC
Power Consumption: HDD Sleep Mode
8.45 W
Power Consumption: Operating Mode, Typical
22.54 W
Power ConsumptionPower Consumption: HDD Sleep Mode
8.45 W
Power Consumption: Operating Mode, Typical
22.54 W
TemperatureOperating Temperature
0 - 40 oC (32oF - 104oF)
Storage Temperature
-20 - 70oC (-4oF - 158oF)
Humidity5-95% RH non-condensing, wet bulb: 27oC (80.6oF)
UsageBackup & stream media through personal cloud
Dimensions7 x 7 x 9
Weight8 lbs
Package ContentsEthernet Cable x 1, Flat head screw (for 2.5" HDD) x12, Power Cord, Flat head screw (for 3.5" HDD) x16, Drive tray keys x 2, AC Adapter, TS-433
Shipping weight3.36 kg
Package size318 × 305 × 254 mm

Other versions of this model

1 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

What size drives fit in the four bays of the TS-433-4G-US?

Each bay accepts 3.5-inch SATA hard drives, 2.5-inch SATA hard drives or 2.5-inch SATA SSDs up to the 88TB total capacity limit.

How do I install drives in the TS-433-4G-US and what step is often missed?

Slide each drive into a tray, secure it with the supplied screws, insert the tray until it clicks, then create a RAID volume in QTS 5.0.1 before storing data — skipping the volume creation is the common error.

What components may need replacement during the life of the TS-433-4G-US?

The 90W 12VDC power adapter and any installed 3.5-inch or 2.5-inch SATA drives are the field-replaceable parts; the 4GB DDR4 memory is soldered and not upgradeable.

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