Encryption: Ensure the service offers end-to-end encryption (E2EE) for data both at rest and in transit.
Data Ownership: Check the service's policy on data ownership and whether they have access to your files.
Two-Factor Authentication (2FA): Look for 2FA support to add an extra layer of security.
Compliance Standards: Verify if the service complies with industry standards like GDPR, HIPAA, or ISO 27001.
Data Backup and Redundancy: Confirm the service has robust backup solutions and redundancy to prevent data loss.
Transparency: Review their privacy policy, terms of service, and any reports on security audits.
bitlifeUser Control: Assess whether you can manage file permissions, set expiration dates, and revoke access when necessary.
Reputation and Reviews: Research the service's reputation and user reviews for any past security breaches or concerns.