I seriously doubt that Autel support will reply to your post on here or give you any insight into any proprietary coding that they use in their scan tools. They always seem to want to cover their own butts with messages to back up the software, and have us agree to disclaimers before using it, but  trying to do it no longer seems to work using external  SD card slot because the system always prevents ES Explorer from writing to an External SD card. Creating Backups to USB storage failed repeatedly for me on a Formatted Used USB storage devices of various brands  too , but I managed to get a backup of my Scan Folder copied to a brand new Sandisk 32 GB USB 3 thumb drive using the SS USB receptacle on my Maxisys Elite. I seriously doubt that after your update period is up and you had a issue where you  perform  a Factory Reset to fix the tool and you reinstalled the your scan folder backup software, you would still be prompted  to connect to the internet , and the server won't give the tool the green light for you to access the your reinstalled  Diagnostics software after your update is expired, and you  will need to buy an update anyhow.

  I couldn't even get an answer on the forum about whether the Later production Maxi Sys Elites had improvements that increased the internal memory from 32gb to 64gb and battery from 13,600mah to 15,400mah, so I installed Device Info HW that confirms it has 64gb memory but the battery Power profile displayed is only 6750mah, so I don't know who's telling the truth , the print on the outside of a Chinese battery , or the Russian APP that's giving information about it , LOL, however it seems to say the status is good.

The App covers information about memory, camera,battery, thermal, sensors, applications, drivers, partitions, PMIC, NET, Input, Codecs, USB. Everything that a Nerd would loves to see but no use to a mechanic that still thinks a Coder is someone that lays back with his joystick coating the walls and call it Painting The Town :-))