SuperD

Hello, I just ran a full disk defragmentation and I noticed there are still files at the end of disk when I analyze drive. It was writing stuff at end of disk during the defragmentation and I just assumed that it uses it as temporary storage to move files around and such. Is this normal behavior? Should there still be stuff left at end of disk after defraggler completes the full disk defrag? How can I get it to move those stuff back with all the other files? Thanks.