Hello everyone, how are you? Please excuse my lack of knowledge, but I need some advice.

I currently have around 5TB of data scattered between my OneDrive account and 2 separate SSDs. I want to create a reliable backup solution for all of my personal and work data.

I recently learned about the 3-2-1 backup strategy, which involves creating 3 copies of your data on 2 different types of storage, with 1 copy being kept off-site (correct me if I’m wrong).

However, in my situation, I work on a laptop that only has 1TB of internal storage and I don’t rely on it for anything other than my active projects. Everything else is either on OneDrive or on the SSD.

So, my question is: how can I benefit from a 3-2-1 backup strategy? Should I invest in a NAS drive and store everything on it, while also using a cloud backup service like Backblaze to keep one copy off-site? And what about a 3rd copy?