I think there is a software that you can recover your file from your android but i don't know if it can also recover the files of your wallet..
if your phone OS is android you can try to use the Dr.Fone i already tried to use this for a long time when i have some customers in my shop i used this tool and works fine but some times there are some files are already corrupted.. but most of the recovered are ok ..
Check this tool
https://drfone.wondershare.com/android-data-recovery.html?utm_source=the_android_guy&utm_medium=youtube_videos&utm_campaign=drfoneforandroid

Hope this can help you to recover your the items from your wallet. .

Follow the guide here. .
https://drfone.wondershare.com/guide/android-data-recovery.html
https://www.mobikin.com/doctor-for-android/

if not working better to root your HTC first before you do this so that they can fully access your phone..

This apps make work if he want to backup images and simple things but files will not work especially if he add me things to phone memory after reboot

If you add new data, that may overwrite the lost files, then you won't get them backup again.