Summarize:

On desktop, open your web browser and go to https://www.onedrive.com/ On mobile, tap the OneDrive app. It resembles either two white clouds on a blue background (iPhone) or two blue clouds (Android). If you aren't logged in automatically select Sign in and enter your Microsoft Live email address and password to log in. This is the default page to which OneDrive loads on both the desktop version and the mobile app. On desktop, the tabs are located on the left side of the page. On iPhone, the tabs are located on the bottom of the screen. On Android, the tabs are located by tapping on the top-left of the screen. Any visual media (e.g., photos and videos) in your OneDrive will appear here. On mobile, its icon resembles a clock. Your recently uploaded, accessed, and shared files all appear here. On mobile, its icon resembles two person-shaped silhouettes. Any file or folder that you have shared or had shared with you will show up on this page. Now that you know how to navigate OneDrive's interface, it's time to upload a file of your own.
Open OneDrive. Sign in to OneDrive. Select the Files tab. Select the Photos tab. Select the Recent tab. Select the Shared tab. Re-open the Files tab.