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Stackable X835 3.5" SATA HDD Board
StackableX835 Metal Case for Pi4&X835/X832&X735
Stackable X835 3.5" SATA HDD Board
Stackable X835 3.5" SATA HDD Board
How to stack & power X835
Stackable X835 3.5" SATA HDD Board


  • It's time to use idle hard drives. you can DIY a small NAS, music player or something interesting with X835 expansion board for Raspberry Pi 4.
  • The X835 expansion board provides a complete storage solution for Raspberry Pi 4 Model B; The X835 3.5" SATA adapter can support up to 10TB 3.5 inch SATA hard disk drives (HDD).
  • The X835 stackable 3.5 inch SATA HDD expansion board, offering an easy and fast way to create bigger storage solution for your Raspberry Pi 4B. Its elegant and ultra-compact design allows 3.5" HDD to be conveniently attached to Raspberry Pi. The SuperSpeed USB 3.0 port delivers a blistering data transfer rate of up to 5Gbps, letting you transfer a large amount of data in seconds. The mounting holes and standoffs help protect the hard disk drives, while effectively drawing the heat away from the drive for reliable performance. The built-in LED light indicates the reading or writing status – no more guesswork again.
  • The X835 can be the perfect storage solution for your home media center and building Network-attached storage (NAS) for storing and streaming your own videos, music, and digital photos around the house and even across the world. the X835 also supports operating system booting from your HDD for faster app opens, web serving and file copying.


Tips about 3pcs DC 5V OUT Port:

When use external latching switch on X835 board, please do not connect 2pin power cable to DC 5V OUT nearby USB2 and USB3.


What do you need to use Raspberry Pi 4 X835 3.5 inch SATA HDD Storage Board?

  • 1. A Raspberry Pi 4 Board
  • 2. A DC 12V ≥3A Power Supply
  • 3. A 3.5 inch SATA hard disk drive(HDD)
  • 4. A X835 Metal Case (optional, will release in the future)


  • Operating System: All Raspberry Pi operating systems
  • Supports up to 10TB 3.5 inch SATA hard disk drives (HDD)
  • Ideal storage solution for Raspberry Pi 4
  • USB 3.0 connectivity offers plug-and-play functionality on your Raspberry Pi 4
  • Quick file transfer with high-speed USB 3.0 connectivity from a PC or a Mac
  • External Self Powered - Do not require power from Raspberry Pi USB port
  • PCB Size 163mm x101mm

Installation Guide

Installation Video

  • youtu.be/8jdNf4sYQkQ

Installation User Manual

X835 Installation Guide


X835 Installation

Packing List

  • 1 x X835 HDD expansion board
  • 1 x USB 3.0 A Male to A-Male Data cable
  • 1 x 2-Pin Power Connection cable
  • 1 x Power daughter board
  • 4 x Spacer F/F M2.5 x 12mm
  • 4 x Spacer F/F M3 x 32mm
  • 8 x Screw M2.5 x5mm
  • 8 x Screw M3 x 8mm

Power Supply

  • Power supply: 12Vdc +/-5% , ≥3A
  • Ports & Connectors: DC jack - 5.5x2.5mm

PS: As we know that the power supply is very important to the hard disk, so please do not use the low quality power adapter. Please use a high quality power adapter, or you may encounter problems such as not recognizing the hard disk.

Some Tips

How to connect X835 and X735?

NOTE: X735 use DC 5V/4A power adapter, X835 use DC 12V/3A power adapter, so DON'T directly connect the 12V/3A PSU to the X735,otherwise the X735 will burn out.

How to connect X835 and X735? X835 V2.1 Function Description

How to stack X835

Note: If you need to use just one piece 3.5" SATA HDD for Raspberry Pi 4, please refer to X832, the X832 use USB bridge to connect Pi 4 with X832.

Please refer to the following guide about how to stack X835:



Matching Metal Case for X835

Please refer to X835-C1.


About USB boot please refer to Does the X825/X855 support USB boot


1. How to use external power switch for X835 board?

Answer: 1. Please use latching switch only and not use momentary switch; The jumper socket fitted for "PWR ON" must be removed when using an external latching power switch. 2.All the board, cable, jumper connections must be under power-off station.

2. What power supply requires for X835?

Answer: The X835 reuqires 12Vdc +/-5% , ≥3A power supply with DC jack - 5.5x2.5mm.

3. Where to connect the power supply?

Answer: Whatever to use with X735 or not, the PSU must be connected to X835 DC 12V IN port, not X735 or Raspberry Pi.

4.How to connect the X735 with X835?

Answer: Connect the 2pin power cable from X835 "5V OUT" to X735 "5V IN". Connect another 2 pinc power cable from X835 "PWR Ctrl" to X735 "5V OUT".

5. How to set the Jumper cap on X735?

Answer: The "L-SW" pin must be shorted when use X735 latching switch port to connect an external latching switch.

6. How to connect the power switch in the X835 metal case?

Answer: Connect the power switch to X735 "Latching Switch" port when use with X735.

7. How many X835 borads can I stack?

In theory, it can stack as many X835 as possible, but considering the speed of USB3 and power supply issues, it recommend that just stack about 3-5pcs X835.

Add your comment
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8 days ago
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Is it compatible with X728? https://rasp...iki.com/X728 When stacked, does it support software RAID?

I want to make all my data safe in case of powerloss.


21 days ago
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I found this picture here on aliexpress selling this. https://imgur.com/a/wuRMaZg

Anonymous user #8

23 days ago
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Hi, I have ordered two X835 boards in order to stack them. But I don't think there's enough room for the 3,5 disk if I stack. Also, I don't have the needed screws to "link" them together. Where do I get them?


Anonymous user #7

2 months ago
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Hi, x835 has 4 usb 3.0, is there anyone connect other disks with them? works well?

Thank you.

Anonymous user #6

3 months ago
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I'm using a Rasperry Pi 4 B with a X835 , a 6TB HDD and a X735 with a 12V 5A power supply. The Pi work and the X835 work also (tested is on my laptop) but when i plug the x835 with the Pi, the Pi seems to freeze. Any ideas what could be the issue ?

Anonymous user #6

3 months ago
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I found the issue ! It seems sometimes USB3 messed up with the wifi in 2.4 GHz just setup the wifi to your 5GHz network and it will work just fine !


3 months ago
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Hi friend,

Yes, you are right.you can refer to here about more info:File:Usb3-frequency-interference-papers.pdf

Anonymous user #5

3 months ago
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Using an x835 box and pressing the power button does not shut down the x835 board & fan. Should it? The Pi switches off but the fan is still spinning and the blue power light is on. No jumper was removed.


3 months ago
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Hi, Please refer to: X835-latching-switch.jpg


Harry / Geekworm

Anonymous user #5

3 months ago
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@Harry - ok so that doesn't seem practical, would an x735 board provide enough general cooling and then remove the case fan? thanks

Anonymous user #4

3 months ago
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I have 2 questions: 1)Does X835 support Raspiberry 3B+ ? 2)Is X835 stackable such as X828?

I have a Pi 3B+ and two 3.5" Disks, and want to build a NAS.



3 months ago
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1. x835 supports PI 3B+; 2. X835 is stackble, but the USB 3 cable is shorten, you need use the long USB 3 cable.

Harry / Geekworm

Anonymous user #3

4 months ago
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I formated the HDD on my desktop pc without problems, but connected back to X835 I got io-faults. Connected back to desktop, no problems.


4 months ago
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Hi,could you please attach your order number to send us some photos?

Anonymous user #2

4 months ago
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I think this system configuration X735 + X835 doesnt works well together. I have exactly the same setup, when i powered on the whole system, it seems my HDD died suddenly...and i got a smell of burning then. HHD died...

i changed the HDD, and i have the latching switch that dont work now, system boot up but latching switch just doesnt works. I think something when wrong for the X835 (or X735) when my first HDD burn.

i got much mail with geekworm for that, and im waiting for an answer, they assume they did test their boards before selling.

I dont think they are going to exchange the boards....


4 months ago
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Hi, sir.

This is really bad news.

Please refer to http://www.r..._and_X735.3F

Anonymous user #1

4 months ago
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Hi, I purchased the X835 case, X835 SATA board and the X735 together with a 4TB WD RED HDD. Partitioning of the HDD was ok but I was not able to format the HDD. After a couple of hours formating, the Pi get stocked. At the moment I'm using an external USB-to-SATA adpter wich works fine.

Do you have any suggestion?


4 months ago
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Hi, Please try to format your HDD on your desktop computer?