Before to do the upgrade which reorganizes the partition of internal memory (I do not remember about the name of this upgrade), obviously I did a backup on SD of all data and applications.
After this upgrade I restored all.
All the pictures were restored in an unique folder named ‘picture’ in ‘Gallery’ build-in app (before there were classified in different folders depending on the app: whatsapp, Retrica, Line, …).
This is quite annoying, but the worst thing is that all videos done with the camera disappeared. Why ? Are they moved in another app/folder ? How is it possible to manually restore them from backup file on SD card ?
It might be that they were not backed up, I’m afraid… The Backup & Restore app, which came with the phone and is provided by Mediatek, really is a mess and should not be used. Better use a backup tool like Titanium Backup.
Mediatek is the producer of the chipset, the FP1 / FP1U uses. You won’t find a link because that app was specifically designed by Mediatek for this chipset. Titanium Backup can be downloaded from Google Play.