I was really hoping for am actual list of folders because there are some folders that are needed for the drive to work properly and you shouldn't delete, such as the folder "SYSTEM VOLUME INFORMATION" which you apparently tried to delete and received the message "Access is denied". Another you shouldn't delete would be $Recycle.Bin.
But if you are careful, there are a couple tools you might install to try and delete files / folders ...
The first is a program called
Unlocker. Install Unlocker (do not install RegistryBooster), then open Windows Explorer and locate a folder you cannot delete on the old hard drive. Right-click on the folder and choose Unlocker from the context menu. In the window that opens choose Unlock All and then in the action choose Delete. It will try to Delete and if unable will offer to delete it on next reboot. If needed to complete the delete, restart your computer.
The second is the
Take Ownership script. For Take Ownership to work you must be logged on as an Administrator. Install Take Ownership, then open Windows Explorer and locate a folder you cannot delete on the old hard drive. Right-click on the folder and choose Take Ownership from the context menu. Once the script finishes and you have ownership, try deleting the folder.
WARNING: Take Ownership is an extremely powerful script and can be used to take ownership of vital system files that if moved or deleted could ruin your OS installation and prevent your computer from working.