I recently switched from a PC to a Macbook Pro. I have a 80gb usb 2.0 external hard drive that is formated NTFS that I used to back up all my pictures, music and work files from my pc. It let me copy files from my external on to my macbook pro no problem but now I want to delete some things from the external so I can replace them with some newer files and it wont let me delete them. It gives me an error code -61. I have reorganized some of my work files and would like to back them up as well as any new music and pictures I have on my Macbook Pro and put them on to my external drive. Any help would be greatly appreciated. Thanks.