If you take a look at this post > https://forums.presonus.com/viewtopic.php?p=212199&sid=79850ff36f67c3107143a9bd11d9e53c
you will see this is a long standing bug within windows 10,presonus studio one and Akai MPC software. It is confirmed from Akai developers,that this is exclusively a Presonus issue. This has nothing to do with Akai. Please fix this bug Presonus, this request has been made to the dev's of Presonus via support tickets for over 6 years now! Drag n drop to Mpc software works on mac, but not in windows! It's not a permissions issue, yet some sort of bug not allowing the drag n drop to be sent while in windows.