Running out of space on your PC used to be a chore. Finding where all those hidden files were and deleting them, particularly if they related to Windows Updates, wasn’t always easy. Now that Solid State disks are commonly installed and tend to be smaller (because they are more expensive) they may fill up quickly especially if you store a lot of images, videos and (less of a problem these days with streaming) music.
The Macnamara Blog
You can sync your OneDrive or SharePoint libraries to your PC, which can be really useful for accessing items in the familiar way using Explorer. It’s also great if you ever work offline and need your files available; you can sync them in advance, work offline, then they’ll sync back when you reconnect. But, over time, these files start to take up valuable space on your PC.