It is the same issue as many other customers.
See the forum; Chuwi Hi10 Fresh Reinstall
- This is a 99% hardware problem. There are a lot of people with such a problem on the russian 4pda forum - after deleting files, they appear back after a reboot, formatting does not help, restoring windows too. If you upload some files to disk and reboot, they will disappear or will be corrupted. Only replacing emmc helps.
It’s called “read-only” emmc status.
There is nothing to but repairing the EMMC module.