If it is a large dump folder, it is for a (like RT809H) and cannot be installed via USB.
: Often hosts firmware for Asian and Middle Eastern Toshiba models. Check their "Toshiba Software" category. Technical Details for the 65U7750 Download TOSHIBA 65U7750 Panel K650WD7 LD450 part2 rar
Note: This site usually requires passing a technical test to register and download. If it is a large dump folder, it
: A popular repository for LED TV software. Search their database for "Toshiba 65U7750." If the file is split, ensure you download all parts to the same folder before extracting. Download TOSHIBA 65U7750 Panel K650WD7 LD450 part2 rar
: This is the primary source for most Toshiba eMMC dumps. You will need to search for "65U7750" or the panel model "K650WD7" in their Firmware section.