Replaced 4x2tb drives with 4x 4 tb drives one by one while in raid 5, i expected the tr004 to recognize extra space on last replacement. not. so how?

RAID does not work like that. When you create an ARRAY, the configuration is written to a configuration file that is either stored on the drives/array or whatever software RAID file you are using. Even in Enterprise Storage, this is how it works. Swapping out to a larger drive will not increase your disk space. You would need to backup your data, then wipe and create a new ARRAY.

How large of a hd tb size is it compatible with?

I've got 4x WD Red Pro 20TB - WD201KFGX running in mine just had to upgrade the firmware to v1.2 (anything lower won't work). Just put in a single drive that's less than that size, plug into your machine, and run the "QNAP External Raid manager" utility to update the firmware (all on their support site).

can it connect directly to router without pc ?

I connected it to my PC first, formatted the 4-drives in raid 10 (NTFS) (using hardware switches, NOT software), created the folders I wanted in it, then connected it to my ASUS router which has inputs for USB storage devices, and all of my computers in the house can "see" the raid and use it for storage.

Can i set this up for raid 1 with 2 drives and jbod/single with the other 2 drives?

I think the question is implying can you set this unit up with two concurrent RAID volumes. A) A RAID 1 set with drives in slot 1 & 2 and concurrently B) a JBOD set with drives in slot 3 & 4. Based on DIP switches, no. It would need multiple sets of dip switches to accomplish this and it appears there is only one set of switches on the chassis. By software, it is a possibility if the management software is slick enough to support this. It would come down to what QNAP provided in the software management console. As I don't have one of these yet, I can't confirm.

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QNAP TR-004 4 Bay USB Type-C Direct Attached Storage (DAS) with hardware RAID (Diskless)

Product ID: 262403015

Details

Brand
QNAP
Colour
Diskless
Connectivity technology
USB
Hard disk description
DAS (comes
Hard disk form factor
3.5 Inches
Hard disk interface
Serial ATA

🔌USB Type-C 5Gbps speed

🔒Lockable drive bays

🛡️Hardware RAID 0/1/5/JBOD

£391.42

Duties & taxes included

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Description

🚀 Unlock Pro-Level Storage Power with QNAP TR-004 – Your Data’s Best Ally!

QUIET SECURE OPERATION - Lockable bays keep drives safe while a whisper-quiet fan ensures distraction-free work sessions.
COMPACT VERSATILE DESIGN - Sleek metal enclosure fits any workspace, compatible with laptops, desktops, and most QNAP NAS models.
EXPAND YOUR NAS EFFORTLESSLY - Boost your QNAP NAS capacity without hassle—perfect for professional-grade backup and storage expansion.
ROBUST HARDWARE RAID SUPPORT - Choose RAID 0, 1, 5, JBOD or individual disks to tailor your data protection and performance needs.
SEAMLESS USB TYPE C CONNECTIVITY - Plug & play direct-attached storage with blazing 5Gbps transfer speeds for Windows, macOS, and Linux.

The QNAP TR-004 is a 4-bay diskless direct-attached storage enclosure featuring USB Type-C connectivity with 5Gbps transfer speeds. It supports multiple hardware RAID configurations (0,1,5, JBOD) for customizable data protection and performance. Designed for seamless NAS expansion and cross-platform compatibility (Windows, macOS, Linux), it offers lockable drive bays and a quiet cooling system in a compact metal chassis, making it an ideal solution for professionals seeking reliable, high-speed external storage.

Specifications

ASIN	B07K4RC7X9
Additional Features	Compact, fast speed
Best Sellers Rank	#43,234 in Computers ( See Top 100 in Computers ) #36 in Network Attached Storage (NAS) Enclosures #742 in Hard Drive Accessories
Brand	QNAP
Built-In Media	AC power adapter x 1, Drive tray keys x 2, Power Cord x 1, Quick Installation Guide (QIG), Screws for 2.
Cache Memory Installed Size	1
Color	Diskless
Compatible Devices	Laptop, Desktop, QNAP NAS Server (except TS-128, TS-228, TS-131, TS-231, TS-431, TS-431U and models that cannot be updated to QTS 4.3.6 or later)
Connectivity Technology	USB
Connectivity technology	USB
Customer Package Type	Standard Packaging
Customer Reviews	4.3 out of 5 stars 617 Reviews
Data Transfer Rate	5 Gigabits Per Second
Enclosure Material	Metal
Form Factor	4 Bay Hard Drive Enclosure Direct Attached Storage (DAS)
Global Trade Identification Number	00885022016358
Hard Disk Description	DAS (comes unpopulated)
Hard Disk Form Factor	3.5 Inches
Hard Disk Interface	Serial ATA
Hard disk description	DAS (comes unpopulated)
Hard disk form factor	3.5 Inches
Hard disk interface	Serial ATA
Hardware Connectivity	USB 3.0
Hardware Platform	Mac
Installation Type	External Hard Drive
Item Type Name	QNAP TR-004 4-Bay USB Type-C Hardware RAID Enclosure/ DAS
Item Weight	1.85 kg
Manufacturer	QNAP
Media Speed	375 MB/s
Mfr Part Number	TR-004
Model Name	TR-004
Model Number	TR-004-US
Number of Items	1
Read Speed	6 Gigabytes Per Second
Special features	Compact, fast speed
Specific Uses For Product	business, personal
UPC	885022016358
Unit Count	4 Count

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