OneDrive is a cloud-based storage service that comes with your Microsoft account. OneDrive is integrated into Windows 10 where you can view, browse, upload, and share the files you saved online to OneDrive from any PC, tablet, or phone.
The OneDrive On This Day feature reminds you of photos and videos stored to your OneDrive from years past to relive old memories.
When you Sign in to OneDrive and have it running, photos and videos stored to your OneDrive folder on your PC will sync to your online OneDrive > Photos > On this day by default.
This tutorial will show you how to enable or disable the OneDrive “On this day” memories are available notifications for your account in Windows 10.