Quote from dzoni_m on October 2, 2026, 5:50 pm

Coped .tar on USB formated as FAT32. Put into unit and hold setup button as per instructions. I get “software update” menu bot nothing happen when klick on it. Just clik and nothing. No reaction. I get brisk “no media on usb” when insert usb stick in port. What I am missing here?

Quote from Ddren on October 3, 2026, 12:00 pm

Quote from dzoni_m on October 2, 2026, 5:50 pm

Coped .tar on USB formated as FAT32. Put into unit and hold setup button as per instructions. I get “software update” menu bot nothing happen when klick on it. Just clik and nothing. No reaction. I get brisk “no media on usb” when insert usb stick in port. What I am missing here?

Hi,

Thank you for reaching out. Based on the symptoms you described, here are the detailed steps to troubleshoot and get your update working:

1. Rear USB Port Requirement (For 280B Units): If you purchased a 280B unit with a rear USB port modification, please note that you must use the rear USB port to flash the firmware. Once the rear USB is retrofitted, the front USB port is disabled and will not work for updating or reading data.

2. USB Flash Drive Recommendations:

   • Use a standard USB flash drive under 32GB (preferably 16GB or smaller).

   • Make sure it is formatted as FAT32.

   • Do NOT use adapters: Avoid using SD/MicroSD cards with USB card readers or multi-card adapters, as the head unit often fails to recognize them properly.

3. File Placement:

   • Do NOT extract the .tar file. Copy the .tar file directly to the root directory of your USB drive (do not put it inside any subfolder).

4. Testing Your USB Drive:

   • To verify if your unit recognizes the USB drive at all, copy a standard .mp3 music file onto the USB drive alongside the firmware file.

   • Plug it into the rear USB port and try playing the song. If the unit can play the music, it confirms that your USB drive and port are working properly.

Please check the rear USB port with a simple USB flash drive following these steps and try again. Let me know how it goes!

Quote from dzoni_m on October 3, 2026, 12:33 pm

My unit doesn’t have rear USB mod. It has only front one. I tried .mp3 and that is working fine. Also that same port works perfectly ok with my phone (for Apple CarPlay).

My usb stick is small 2GB unit, formated as FAT32 on Windows PC directly. No adapters, etc. File is directly on drive in root of USB stick. I didn’t modify filename at all. Also tried with short name (like fw_upadate.tar) to avoid potential filename character limits. Didn’t work also.

Quote from Ddren on October 3, 2026, 4:08 pm

Quote from dzoni_m on October 3, 2026, 12:33 pm

My unit doesn’t have rear USB mod. It has only front one. I tried .mp3 and that is working fine. Also that same port works perfectly ok with my phone (for Apple CarPlay).

My usb stick is small 2GB unit, formated as FAT32 on Windows PC directly. No adapters, etc. File is directly on drive in root of USB stick. I didn’t modify filename at all. Also tried with short name (like fw_upadate.tar) to avoid potential filename character limits. Didn’t work also.

Thank you for providing those additional details.

The issue you are experiencing is almost certainly related to the filename or the USB flash drive compatibility:

1. Crucial Filename Requirement: Please note that the filename must never be changed or renamed. The unit's system specifically scans for files that start with std_plus_pss-6.5inch_. If this prefix is altered or shortened (such as renaming it to fw_update.tar), the unit will not recognize it as a valid software update package, which is why the "Update" button does not react.

2. Firmware Status & USB Drive Compatibility: This exact firmware package has been tested and successfully installed by many other customers without issue, so the firmware file itself is 100% verified. Since your unit is not triggering the flash process, the unit is having a low-level compatibility issue reading the update file structure off your current USB stick (even if it plays MP3s).

Next Steps:

• Restore the original downloaded filename (do not rename or modify any part of it).

• Try a different USB flash drive (ideally another brand/model, 16GB or 32GB, formatted to FAT32).

Please try flashing again with a new USB drive using the unmodified original filename and let me know how it goes!

Quote from dzoni_m on October 4, 2026, 10:41 am

I tried with 3 different USB flash drives. 1 USB drive is 2GB size, another one 16GB and 3-rd one 64GB. 3-rd one has clear message: USB device not supported. For other 2 I get only that there is no media on it, which is true since only .tar file is there. So USB is correctly recognised. What is exact filename which has to be? So that just to make sure that my download didn’t fail.

This is what I got after download: std_plus_pss-6.5inch_MQB_5538_ROW_PHONE_DirectAA_AUX_v3_candidate.tar

 

Quote from Ddren on October 4, 2026, 11:04 am

Hi,

To help resolve this, I have re-uploaded the firmware package and personally downloaded and tested it to ensure there are no issues.

Here are the key details for your new download and setup:

1. New File Details & Simplified Filename:

   • New Filename: std_plus_pss-6.5inch_MQB_5538_ROW.tar

   • Exact File Size: 215.4 MB

   • I shortened the long candidate suffix to eliminate any potential file-system parsing issues on the unit, while keeping the essential std_plus_pss-6.5inch_ prefix intact.

2. Verified Working & Download Check:

   • This firmware build has already been purchased, downloaded, and successfully flashed by other customers without any problems.

   • I also personally downloaded this file from the storage link and executed the update process to confirm everything works as expected.

   • Please check your connection/browser settings: If your system still fails to read the file, please verify whether your local network or browser download manager is placing any restrictions, truncating, or corrupting the downloaded file structure during transfer. Always verify that the final downloaded file size on your PC matches 215.4 MB.

3. Final Flashing Checklist:

   • Do NOT unzip or extract the .tar file after downloading.

   • Copy std_plus_pss-6.5inch_MQB_5538_ROW.tar directly to the root directory of your FAT32 USB drive.

   • Make sure you are using a standard USB flash drive (USB stick) and not an SD card or SD-to-USB adapter.