Hello Judo, thank again for your answer.
I have saved my .dat files in my computer, i have format my drive, i have reinstall Sandisk SecureAccess 2.0 on my drive, with the same password, but now when i copy and paste a .dat file from my computer to the Vault folder, nothing appears when i log in “SanDiskSecureAccessV2_win” 
I have forget something ? 
