Important data - phone (internal), SD card, laptop, NAS and 2 cloud accounts (servers thousands of miles apart).
Unimportant data - wherever it is.
Hardware (even the most expensive phone) is cheap - data is priceless
This was borne out to me when I needed some important medical insurance data on October 18, 1989. The insurance adjudicator company was located in what had, until the day before, been a building in San Francisco. (Remember the Loma Prieta earthquake?) I needed the data then, not a few days later, or it would cost me a bundle. (Funny how some people can't adjust the rules for reality.) I called the number, expecting "all circuits busy" or, at best, no answer. I got someone at the company, who was able to look up the information for me with no problem.
They rented space a few miles outside of town, rented a few dozen computers, had the data backups delivered and restored - all before 9 AM PST the day after the quake. I always made sure I had all my data backed up at all times, but that really drove it home.
Since then I've worked for a company on the east coast that had rented space on the west coast for a fully duplicated network - sort of a long distance RAID. No restoration needed - lose one location and the people at the other location could keep on working. I don't need that level of backup, but that's backup.
But I still don't trust my data to a single place - not even the picture of the nice walk someone put up for me from my driveway to my house (which I show when I recommend him for work). If I took the time to get the data, I can take the time to back it up.