iPhone on Windows: Windows needs Apple's device driver to connect to your iPhone. Install Apple's free Apple Devices app (or iTunes).
Checksums for every build are on the release page (SHA256SUMS.txt).
The preview is free, no account needed. Plug in your phone and it shows you how many photos and videos you have, and how much space they take, ready to copy. Backing up needs a license: $49.99 once covers two phones, on any Mac or Windows computer.
You're on your phone
iPhone and Mac? Your Mac may already be showing this page: look for the Safari icon at the end of the Dock.
Windows PC: pay here on your phone. Your license key is on the next page and in your email. Tonight, install the app on your PC and enter the key when you plug in your phone.
Buy on my phoneMac: Off My Phone is coming to the Mac App Store. Tap Remind me tonight, or have us email you the link.
iPhone on Windows: Windows needs Apple's device driver to connect to your iPhone. Install Apple's free Apple Devices app (or iTunes).
Checksums for every build are on the release page (SHA256SUMS.txt).
Bought it on the Mac App Store and need the Windows version? It's included. Get your Windows license key.
Connect your phone to your computer with a USB cable.
A drive, a folder, an external disk, or a network drive.
The first backup copies everything. After that, only what's new.
Stuck? Plugged in but not showing up? The support page has the common fixes.