The identifiers in your subject line are critical for finding correct firmware updates ("upd"):

The sequence "wm8850 mid7 puzhi w01 8223 ft5206 w70 wmc15797z upd" refers to the technical identification and firmware configuration of a vintage 7-inch Android tablet, primarily based on the chipset. These devices were popular in the early 2010s as budget-friendly alternatives to high-end tablets, often sold under various "off-brand" names. Hardware and Identification

Unlike mainstream brands, these devices did not have official websites or over-the-air (OTA) updates. If a user accidentally wiped the system, their only recourse was to scour obscure technical forums and repositories like Google Drive file directories to locate the exact matching package, such as the Wm8850 Mid7 Puzhi W01 8223 Ft5206 W70 Wmc1579.7z compressed file. Step-by-Step Restoration Guide

Locate the folder structure. You must see a folder named FirmwareInstall and a script file named wmt_scriptcmd .