Use a program like 7-Zip to extract Usg6000v-hda.7z . This reveals the virtual disk file (often named vfw_usg.vdi or similar).
: Besides 7-Zip, other software like WinRAR or PeaZip can also extract .7z files. Usg6000v-hda.7z Download
For official technical guides and API documentation, you can visit the Huawei Support Portal . Use a program like 7-Zip to extract Usg6000v-hda