OneDrive online storage is available for PC, Mac, Xbox and mobile devices that run on the Windows, Android or iOS platforms. OneDrive is part of Windows 8.1 and later versions of the Windows operating system. If you run an earlier version of the Windows operating system or Mac OS X, you must download and install the OneDrive desktop app on your computer. This app creates a OneDrive folder on your computer that syncs files across your devices automatically.
As of 2015, the latest versions of Windows phones and tablets come with the OneDrive mobile app. If you have a mobile device running iOS or Android, you must download and install the OneDrive mobile app on your device. To use OneDrive on Xbox One or Xbox 360, select Browse Apps and select OneDrive to install the app.
The OneDrive mobile app allows you to view, upload and share files from your mobile device. It also allows you to back up the photos in the camera roll of your device automatically. To upload photos from an iOS device, open the OneDrive app on your device, tap the More button in the upper right, tap the Add Items button, and select the photos to upload.
You must have a Microsoft account to access and sync files to OneDrive on all platforms.