From wikipedia for those, like me, that don't know about ISO27001 :

ISO/IEC 27001 requires that management:

Systematically examine the organization's information security risks, taking account of the threats, vulnerabilities, and impacts;

Design and implement a coherent and comprehensive suite of information security controls and/or other forms of risk treatment (such as risk avoidance or risk transfer) to address those risks that are deemed unacceptable; and

Adopt an overarching management process to ensure that the information security controls continue to meet the organization's information security needs on an ongoing basis.

Add the Izzy repo in Fdroid and download

Online storage ? Several hosts are based on nextcloud.