I don't back up. I connect my iPhone to my PC and drag the DCIM folder over, name it "Nerps Sept. 2016 iPhone Dump," move it to my file server then I open the photo gallery on the phone and delete everything when its full. (Something you can't do on a Mac easily--have to use crap Apple apps to move photos off).
All other info on the phone can be redownloaded after a reset in just a few minutes. Apps can all be reinstalled in seconds and I hold no personal data on my phone other than photos. And though I move the originals to my home server regularly, they're also being dumped into the cloud using OneDrive in real time. I have 1TB storage via my office 365 account so I use that as a secondary photo backup for my phone.
All my email is IMAP, etc, and other than that, there's nothing on my phone that would be "lost" if I had to start over with no backup.
I don't use Apple's iCloud or other services. Never liked them and they've never been reliable for me. Plus the space limits and pricing is really not that great.
Backups for my phone are basically a waste of time. I spend less time grabbing apps and signing into my accounts on my phone than I do creating and storing backups.
Turns out my PCs are the same these days. I can go from a bare Windows 10 install to fully setup and configured in 5 minutes. 10-15 minutes if you include the time to install the OS. All my personal stuff is either on my file server with redundant storage (plus mirrored to a space machine with a pair of HDs using storage spaces then synced to Carbonite) or in the cloud itself: OneDrive, IMAP, etc.
I like not having to deal with traditional "backups." They consume tons of space and with fast internet, fast computers and all my data synced and stored both on my home server and the cloud, my PCs and devices are mere terminals when it comes to accessing personal data.
It extends to games, even. With Steam, I don't give a crap about CD-Keys and stuff. Wipe drive, reinstall Windows, install steam, click on the games I want installed, get that going, hit minimize and move on to the next thing as that streams in the background.
Man, I love computers these days.