.DEVICESALT File Extension
File TypeNOOK Device Salt File
What is a DEVICESALT file?
File found on NOOK eReader devices; likely used for device security, since a "salt" is a cryptography technique used for password authentication; has no filename prefix since it is named .devicesalt.
You can see the .devicesalt file by connecting the Nook to a PC and opening the mounted drive with Windows Explorer. Windows Explorer will not allow you to open the file, but it will let you see it.