This article explains the changes to Website Lockers in School Loop Version 2.
When the old site pages are converted over to version 2, the website lockers also get copied over to the new system. After the conversion is complete, the new locker will be accessible via the Locker tab in the Site Center and not in the My Locker icon at the top of the portal.
The old and new website lockers do not stay in sync after the conversion.
If files are added to the old website lockers via My Locker, those changes will not be reflected in the new website lockers via the Site Center.
Once the new School Loop version 2 site is published, the old website lockers in My Locker are replaced with the new website lockers.