The April update also created disk full errors. People should really hold off on updating until this is fixed.
https://answers.microsoft.com/en-us/windows/forum/windows_10-files/new-partitions-may-appear-in-file-explorer-after/115d2860-542e-410f-983c-2aeb8bbd7d13
Wow. That problem is worthy of a thread of its own.