When you sign out of Proton Drive on a local computer, Mac or Windows, the synced copies of the files remain unencrypted on your local disk.

There are three simple use cases here that could be facilitated by options on the sign-out page.

1. Securely remove all data from the local disk
2. Encrypt the locally stored data until the user signed in again
3. Leave the data as is, open and insecure - the current behaviour.

This would allow the user to choose how their data is handled when signing out.