Microsoft announced Windows 10 Insider Preview Build 16232 for PC and Windows 10 Mobile Insider preview Build 15228 to Insiders in the Fast ring. Microsoft introduced this Controlled folder Access new security Future for Windows to Protect user from the Advance threats, Malicious apps and Ransomware that used to Deeply Monitor the changes in the folders. Controlled folder access can be useful if youre finding a particular app that you know and trust is being blocked. Microsoft Said. You can add additional folders to the list of protected folders but you cannot alter the default list, which includes folders such as Documents, Pictures, Movies and Desktop.”]

