@Juan Carlos Yagues Blasco We have 2 recommended firmware with different UI, you can feel free to choose one to update.
Android 10 Update
MAX10 Version:Make Sure your unit is PX6 Andorid 10
HA3_rk3399_10.0_ota(20230803)
https://www.dropbox.com/scl/fi/sy068zz4tgokutkfhuwkt/update.zip?rlkey=uuhukuun3882rz4cyqxsgs9k6&dl=0
Vivid 10 Version: Make Sure your unit is PX6 Andorid 10
telenav_vivid_rk3399_10.0_ota(20230801)
https://www.dropbox.com/scl/fi/aaqv1utd0wx0t2rl4kyeq/update.zip?rlkey=ria0tfcoxbcioqh2pb9z38tzg&dl=0
1.Please download the document though the link via your computer/laptop.
2.Please make sure to format the USB drive(FAT32 Format)/SD card before copying the update file to it.
3.Please ONLY put Update.zip file into the USB drive/SD card,and then insert the USB drive to the USB cable.
*Please note that all data on this unit needs to be wiped before updating the system, so back up important data if necessary.
Looking forward to your reply.