When migrating from SharePoint on-premises to SharePoint Online/Office 365, you may find that some users have a checked-out file called `spcommon.png`. If you ask users about it, they’ll have no idea what you’re talking about.
As it turns out, this isn’t a bug. It is possible for users to check-out this file without knowing they did it.
What happens when you compile all the migration best practices articles you can find — compiled in a single article.
SharePoint Online’s maximum file URL path is 400 characters. Find out why you should plan your file migration to SharePoint so that the 400-character limit doesn’t cause issues.