Lost data during transfert from smartphone to PC

I use cybertracker for 3 years, and this night when i want transfert my data , i can’t found them in my database (naturalist observation) in my PC.
i have make transfert again with out results. Data from an other database (car use data base) where well recevied in my pc.

there is no new orphan data and no data in the smartphone app (all sightings).

Any idea or soluce to recover data ?

Bruno from France

Can you please check all the folder under “system”?
Good luck