Cannot Acess Folder on Externally Mounted HD

Solution 1:

The problem here is that the drive is formatted as NTFS, which supports permissions, and your user account is locked down to PreviousVistaMachine\john, which is NOT going to be the same SID as NewWindows7Machine\john, so it's rightfully telling you "Access Denied".

To fix it:

1. Click on the folder, right click it and choose properties.
2. Click Security.
3. Click Advanced.
4. Click the Owner tab.
5. Click Edit.
6. Click your name.
7. Check the "Replace owner on subcontainers and objects".
8. Click Ok.

After that, you might still need to go into the security tab and grant yourself rights to the folder - but try it first and see.

Good luck!