Zsun SD111 Wireless USB Flash Drive Review

Zsun SD111, SD112 and SD113 are Wi-Fi / USB flash drives with respectively 8GB, 16 GB and 32GB storage. GearBest sent me the 8GB version (SD111) for review, as it could be an interesting platform to hack. I’ve take picture of the device, take it apart to check the board, review quickly the standard features with Android and Ubuntu, and try to access the board from the network.

Zsun SD111 Unboxing

I received the device in the following package.

The flash drive comes with a micro USB to USB cable for charging and accessing the device from a computer, and a user’s manual in Chinese.
You’ll probably prefer using a soft copy user manual in English

Zsun SD111 Board and Battery

To open the stick, insert a sharp and thin object in the hole for the neck strap, and push upwards to lift the top cover a little, and finish popping up the cover with another sharp object. I used some tools from a dissasemble toolset I recently bought.

Top of ZSun SD111 Board (Click to Enlarge)
Top of ZSun SD111 Board (Click to Enlarge)

The Wi-Fi SoC is Atheros AR9331, AXP192 is used for charging, and on the top of the Qualcomm SoC you’ll also find UART pins probably allowing access to the serial console (Not tried yet). There’s also SMSC USB2240 USB bridge to handle the USB flash drive part of the device.

Bottom of ZSun SD111 Board (Click to Enlarge)

On the back you’ve got the flash and RAM, with the board being named SD111_HW_V2_0.

700 mAh Battery
700 mAh Battery

The battery is apparently 700 mAh as claimed in the specifications.

In my first Zsun SD111 blog post, the specifications were not fully complete, so here’s an update:

  • SoC – Qualcomm Atheros AR9331 Wi-Fi SoC @ 400 MHz
  • System Memory – 32MB DDR SDRAM (Winbond W9425G6JH-5)
  • Storage – 8 MB SPI flash (Winbond 25Q64FS1G) for firmware, and 8 GB eMMC (Toshiba THGBM2G6D2FBAI9 ?) for storage
  • Wi-Fi – 802.11 b/g/n up to 150Mbps with open, WEP, and WPA/WPA2 security.
  • USB – micro USB 2.0 port to transfer files and charge the battery
  • Battery – 700 mAh Li-Po battery. Good for 3h30 of continuous use. Includes automatic power off after 5 minutes of inactivity.
  • Misc – Power button, abd LED
  • Dimensions – 8 x 3 x 1.2 cm
  • Weight – About 30 grams

Zsun SD111 Mini Review

I’ve put the device back together, to try it out. First I connected it to my Ubuntu PC with the provided USB cable, and charging LED went on, but the drive was not recognized as a standard USB flash drive, and nothing was shown in the kernel log. That’s because it needs to be switched the USB storage mode in the app as we’ll see later.

First you need to press the power button on the top of the stick for two seconds to turn it on, and install Apple Extender (previously known as SuperDisk) app in Android or iOS.
Then you can either connect to zsun-sdXXYYZZAA ESSID via the Android setting, or simply start the app and select the device ESSID. From there you’ll then be able to access the files and drive on the flash drive, and copy files and directory from/to your phone and it works quite well.
When you select files or folders, icons to share, copy, cut, and delete appear at the top. Further options are available with the setting button, such as changing the ESSID, checking the firmware (via Device state menu), backup the data and so on. You may to select “Connect network” if you rely on your Wi-Fi router for internet connectivity.

If you want to use the device as a standard USB flash drive, you need to slide the blue button on the bottom right in order to enter “PC” mode.


In theory, It’s also possible to access the flash drive with Wi-Fi from a PC, but you need to install ZSunCloud.exe program (Windows only) from http://www.zsuncloud.com/. Unfortunately, I;’ve been unable to find the program, maybe because I can only read a few Chinese characters… [Update: ZSunCloud.exe is actually inside the stick, as we’ll see below]

TCP Services Opened on Zsun SD111

I’ve also checked whether it could be possible to access the device from the network, So I enabled Wi-Fi on my computer, and connected to zsun-sdXXYYZZAA access point.

Let’s find the subnet used:

and scan for open TCP ports:

So Telnet is open, but unfortunately I could not find the login credential, trying the usual root/root or admin/admin. I also tried to load the webpage in my web browser with, but I got was an empty page with the title “Success”. Looking into the code it will provide a download link if it detects Android, iOS mobile device or a Windows computer, and this is the link to use to download the windows application:

Trying generates an “Access Error: Site or Page Not Found” page.

So unless we can find the right username / password for telnet, it seems impossible to access the device without soldering the UART pins, and I may try to do just that this week-end if some of you are interested.

GearBest, which kindly provided the sample for the review, sells Zsun SD111 (8GB) for $22.74, but if you want more storage can purchase 16 or 32GB versions on DealExtremeAmazonGeekBuying, and others.

Share this:

Support CNX Software! Donate via cryptocurrencies or become a Patron on Patreon

ROCK Pi 4C Plus
Notify of
The comment form collects your name, email and content to allow us keep track of the comments placed on the website. Please read and accept our website Terms and Privacy Policy to post a comment.
Weller PCB manufacturer