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) | Hardware RAID, Diskless

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

Product ID: 95664665

Details

Brand
QNAP
Color
Diskless
Compatible Devices
Computers
Connectivity Technology
USB
Hard Disk Description
DAS (comes
Hard Disk Form Factor
3.5 inches

🔒Lockable drive bays

🔗USB Type-C 5Gbps speed

🛡️Hardware RAID 0/1/5/JBOD

AED 1267

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Description

🚀 Elevate your storage game with QNAP TR-004 — speed, security, and scalability in one sleek package!

SECURE COMPACT DESIGN - Lockable drive bays ensure your drives stay safe, while the sleek metal enclosure fits any modern workspace.
PLUG AND PLAY CONVENIENCE - Diskless design lets you choose your drives, with included cables and accessories for instant setup.
EXPAND YOUR NAS EFFORTLESSLY - Boost your QNAP NAS storage capacity without hassle, perfect for growing professional demands.
BLAZING USB TYPE C CONNECTIVITY - Seamlessly connect with 5Gbps transfer speeds for ultra-fast data access across Windows, macOS, and Linux.
VERSATILE HARDWARE RAID SUPPORT - Customize your data protection with RAID 0, 1, 5, JBOD, or individual disk modes to fit your workflow.

The QNAP TR-004 is a 4-bay diskless direct-attached storage enclosure featuring USB Type-C connectivity with 5Gbps transfer speeds and hardware RAID support (RAID 0,1,5, JBOD). Compatible with Windows, macOS, and Linux, it expands QNAP NAS capacity while offering lockable drive bays and a compact metal design. Ideal for professionals seeking fast, secure, and scalable external storage solutions.

Specifications

ASIN	B07K4RC7X9
Additional Features	Compact, fast speed
Best Sellers Rank	#10 in Network Attached Storage (NAS) Enclosures
Brand	QNAP
Built-In Media	Drive tray keys x 2, Power Adapter, Power Cord x 1, Quick Start Guide, Screws for 2.5-inch drives x 12, Screws for 3.5-inch drives x 16, TR-004 external RAID enclosure, USB Cable, USB cable clip x 1
Cache Memory Installed Size	1
Color	Diskless
Compatible Devices	Computers
Connectivity Technology	USB
Customer Package Type	Standard Packaging
Customer Reviews	4.1 4.1 out of 5 stars (693)
Data Transfer Rate	5 gigabits_per_second
Enclosure Material	Metal
Form Factor	Mini-ITX
Global Trade Identification Number	00885022016358
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	Not Specified
Item Type Name	QNAP TR-004 4-Bay USB Type-C Hardware RAID Enclosure/ DAS
Item Weight	4.1 pounds
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
Specific Uses For Product	business, personal
UPC	885022016358
Unit Count	1 Count
Warranty Description	2 year warranty

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