I would like to propose an idea for an option that allows users to opt-in for the recovery of previously encrypted files without needing a recovery key, similar to features available in services like Google Drive and OneDrive. This is especially helpful for users who may have lost their recovery key or forgotten their password.
Details:

Background:

Currently, if a user forgets their password and loses their recovery key, they are unable to regain access to their previously encrypted files. This situation can be critical if there is no backup of important files.
Proposed Solution:

Introduce an opt-in feature during account setup or within settings that allows users to choose whether they want Proton Drive to store an encrypted backup of their files. This backup could be accessed upon account recovery.
Benefits:

Provides users with a safety net in case they lose their recovery key, akin to practices from other cloud services that ensure continuity of access to user files after account recovery.
Offers users the flexibility to balance between security and recoverability based on their personal needs.
Security Considerations:

Clearly communicate the risks associated with choosing this option, such as potential vulnerabilities. Given that my account is secured with two-factor authentication, I am confident in the safety of my files and believe I should have an option to recover them even without the recovery key.
Personal Experience:
As a user, I recently encountered a situation where I lost access to important files due to a forgotten password and lost recovery key. This feature would significantly mitigate such risks in the future.

Thank you for considering this idea to enhance user experience and provide more flexible recovery options.