Western Digital SanDisk SecureAccess IXPAND 3.0 32GO Quick Start Manual page 30

d. SanDisk Privacy Statement
e. Legal terms and conditions
Device FW Update
SanDisk rolls out regular app updates to constantly improve the user experience.
When a firmware update is available and the drive is connected to an iPhone or iPad,
you will see a prompt in the app (as below). Hit OK to update the app.
DO NOT disconnect the drive while app update is in progress.