You saved the previous firmware file (e.g., v5.1.0.22-en-ptc01.bin ).
In the silent, humming corridors of the Quantum-Tech server farm, a single file sat nestled in the deep architecture of the "Legacy" sector: v5.2.1.37-en-ptc01 v5.2.1.37-en-ptc01 firmware download
Based on the naming convention, this firmware version (v5.2.1.37-en-ptc01) appears to be a specific regional or proprietary release. You saved the previous firmware file (e
Search the Dahua Support Center or use the DahuaWiki Firmware guide for instructions on "Cloud Update" via the DMSS app. v5.1.0.22-en-ptc01.bin ). In the silent