By reading about the new inclementations on Google I decided to leave from Google services entirely, already stoping using Windows for 6 month and Chrome, but sttil dont sure about a gmail(Some important things are signed in gmail accont) and some services like Youtube and some android telemetry(already rooted)
Nordlocker is neither open source nor has it been audited. Tresorit at least has audits.
NordLocker was part of Nord Security external ISO27001 audit in 2022. Of course, being closed-source software you can’t really know security fully. The biggest concern seems however to be the encryption model they use in addition to being closed source. However, for example, hosting my own cloud service while most secure really isn’t the option that would answer the reason I use cloud service.
I am not saying use it. I am saying it often gets recommended. I really do think people should do their own research on if things are best fit for them. I am having a huge issue finding actually secure solutions that are not self-hosted and FOSS or at least open source. Nextcloud which is fully hosted by service or on your own bought server space has some concerns as well.