If you receive the error “Your Music folder can’t be accessed” while opening Engine DJ on a Windows computer, this likely means that your music folder is not write enabled, or Controlled Folder access is enabled on the system.

The Controlled Folder access feature in Windows can be enabled or disabled entirely, or set to only protect specific folders. In order to allow access for Engine DJ, you must disable the feature or remove your account’s music folder from the protected folder's list. For more details on using and changing this Windows feature, please refer to the article below:

Enable controlled folder access | Microsoft Docs