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  • SMART 6.3
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    © James Slade/Re:wild
SMART 6 Release
SMART Desktop
Download SMART Desktop



Install SMART Desktop
  1. Download the applicable file from above.
  2. Unzip (extract) the SMART 6 zip file contents into a folder on your computer from where you will be running SMART.
  3. Run the executable SMART.exe (on Macs this file is called SMART.app) to launch SMART.
  4. Install Plug-in (File -> Install New Plugins

When first installing SMART, use the following credentials to login to the sample conservation area:
User Name= smart
Password = smart


Sm3255aa Memory Bar Driver 43 ((hot)) Jun 2026

: In Windows Device Manager, Code 43 means the operating system receives a faulty hardware descriptor. Windows knows a device is plugged into the USB port, but the device cannot announce its proper storage configuration or available storage size, forcing Windows to shut down communication. Step 1: Rule Out Basic Hardware and Windows Issues

: The drive appears read-only, and formatting through standard Windows tools fails.

Unplug your USB drive, restart your computer, and plug the drive back in. Windows will automatically attempt to reinstall the correct driver. 3. Use an SMI Mass Production Tool (MPTool) Fix graphics device problems with error code 43

The SM3255AA is a single-channel USB 2.0 flash memory controller designed for high-performance and cost-effective USB drives. Silicon Motion, Inc. (SMI). Identification Strings: VID (Vendor ID): 090C . PID (Product ID): 3000 . Sm3255aa Memory Bar Driver 43

To understand how to fix it, you need to look at what the components mean:

When we say "Memory Bar," we are referring to a standard USB flash drive or thumb drive. The "SM3255AA" is the brain of the operation. It handles:

This error primarily means that Windows has lost communication with your Silicon Motion (SMI) storage controller, or the onboard microcode has corrupted, making the computer see the drive as raw engineering silicon rather than an actual storage device. : In Windows Device Manager, Code 43 means

It's helpful to clarify this part of the search term. There is no downloadable file called the "SM3255AA Memory Bar Driver 43." The "driver" in this context is the built-in (usbstor.sys), which is part of Windows. The "Code 43" is an error code generated by Windows Device Manager. It signals that the hardware device (your USB drive) has reported a general problem to the operating system, and as a result, Windows has stopped it from functioning.

If the normal driver cannot read the drive, the only software that can sometimes communicate with the controller is a .

In rare cases, the physical NAND memory cells have degraded. The controller still powers on, but it cannot map the bad blocks, so it reports a fatal error to Windows. Unplug your USB drive, restart your computer, and

If your USB drive has failed, you will likely see one or more of these symptoms:

Alternatively, if you're comfortable, could you share the showing in your Device Manager? I can help you look up the specific fix. 3.25.70.105 Sm3255aa Memory Bar Driver 43 May 2026

on the drive. It is a "Mass Production" tool used to restore the factory state of the controller.