: Insert the USB into the receiver, navigate to Menu > System Tools > Upgrade by USB , and select the file.

: Format a USB drive to FAT32 and copy the extracted file to the root directory.

: This software is enterprise-grade and typically requires a license. You can find official updates and releases through Auto-Star's Support .

If your "900 Plus" refers to a printer (like the TUP900 series): Upgrading the firmware – DR900X Plus series

If you are referring to the point-of-sale and retail management software:

The "STAR 900 PLUS" name typically refers to either a digital satellite receiver or specialized retail software. Guides for downloading and installing these files (often packaged as .rar archives) vary significantly depending on the device or system. If you are looking for firmware updates for a STAR 900 PLUS satellite receiver:

: Do not turn off the device during the update process, as this can cause permanent damage. Option 2: Star-Plus Retail/POS Software

: Installation usually involves a setup executable rather than a simple .rar extraction. It is recommended to contact their Technical Support for a secure download link and installation guide. Option 3: Star Printer Firmware (TUP900 / TSP100)