My files are not visibles

So, sandisk support said me : “We can’t do anything, because normally the .idx and .idx.bak files shouldn’t be a size of 1KB”

But it’s strange because i can still encrypted and decrypted new files with the same “System Files”.  They despite customer, if there is a programming problem, it’s their developers to seek a correctional patch. Moreover, no update notification to version 3.

In short, I hope I am wrong but I believe that our data are lost. I tried to formatting the drive and reinstalling the software but nothing changes.