Any way to keep "ALL" contents backup?

Hey all, hope you all are having an awesome day

Now, I want to keep daily works as backup into the cloud and that includes my business and personal things on daily basis. But I want a good trustable cloud service who won't look into my personal as well as business files because face it no one would like anyone to look at their personal and business stuff. I think there was an article where one drive's stuff accessed some contents or it was Evernote? I don't remember exactly.

The thing is I want to keep the daily backup of all my business files as well as personal things into the cloud. The reason is I fear that my lappy may stop working one morning and I lose all data and I already have 2 external HDDs but we don't know when external HDDs can stop working. Electronics these days...haha!
Another major reason is that my friend's laptop was stolen from a public place and there was no one to blame. Actually, it was his foolishness to keep his lappy like that on the table without staying alert. So, I fear that same can happen to me and I lose my crucial data and files. Robberies are so pathetic. Hard earned money and things go away in an instant.

So, which is a good trustable cloud service that will securely keep my biz as well as personal data?

What will you recommend and what do you use yourself to back up your important work files and personal things?

Thanks in advance!