Recover files deleted by Kodi / Android.

HELP…Does anyone know how to recover files etc from accidentally deleted drives. A buddy running Kodi 16 on a Qmedia Q10 Pro (Android) accidentally deleted the all the files instead of a doing a cleanup of the data base. Total of four drives , 8 terabytes in total. I have tried to use Easeus Pro with Win 7 to undelete but it cannot detect the folder structure. Tried a couple of other programs with the same results. Seems to find a lot of files including movies, kodi stuff etc. but does not detect the folders. Does anyone know what Kodi does to delete the files? Any help would be appreciated.
Thanks
videoed09