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Don't turn it on thinking it's just some harmless add-on! The thing is, it's not really about whether Microsoft can store the screenshots securely (theoretically they can), but rather that anyone with access to your PC can see everything you've done over the last few months - passwords, private conversations, everything. If someone steals your laptop or you have a coworker with bad intentions who gets their hands on it, you're exposed. My suggestion is to leave it disabled by default, especially if you use your PC for sensitive stuff.
Recall captures screenshots of everything you do on your PC every few seconds and indexes it with AI so you can search through it later, like "show me when I was looking at that email". The problem is that these screenshots contain EVERYTHING - passwords, card numbers, private conversations, anything that appears on screen. It's stored locally on your PC, but encrypted.
Its security really depends on how you use it. If someone gets physical access to your PC or exploits a vulnerability to access the Recall database, all that sensitive information gets exposed. Microsoft said the data is encrypted and only you can access it, but historically we've already seen security breaches in systems like this. The feature also takes a screenshot of any app you open, including ones you use for pretty personal stuff. It's not impossible, but it's kind of risky to leave it on if you work with confidential information or share your PC with other people.
If you want to use it, at least consider disabling Recall when you're accessing really sensitive things (banking, work email with confidential data, etc). Or just leave it off and turn it on only when you need to search for something specific. A lot of people are disabling it by default while Microsoft doesn't sort out the security issues better.
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