Thank you for the guide!
Annke c800 model I91BN
Succesfully upgraded to hikvision firmware version: V5.7.13 build 230706
The firmware was located at: Home » portal » Technical Materials » 00 Network Camera » 00 Product Firmware » G5 Platform » 01. (2xx3G2 2xx6G2(C) 2XX6G2H 2xx7G2(C) 2XX7G2H...