Well, not really. Usually people have all their personal data on their PC, rather than mobile phone.

Maybe this is changing for young people, but on my parents hard drive (for example) there is 30+ years of all sort of personal data, documents of every kind, emails, documents, etc. Not counting all the password and access saved in the browser itself.

If we talk about businesses, public administrations, hospitals basically everything is inside computers, including very sensitive data.