TL3/626 Can't write on internal memory

Hello,

My touch lux 3 is brand new from this morning.
I'm trying to update the firmware.

When i'm trying with the wifi to do the update i have always an error that the file is corrupted.

When i copy on the internal memory, the files disappear when i reboot....
The ereader never finds the files. I connect the all back, and no update files on the ereader.
When i do a new folder on the internal memory and i reboot, no new folder.

What im doing wrong ?

PS: it's my second touch lux 3, for the first one the wifi never worked.....

Can someone please help me ?