[Help] Unable to delete folder w/root access

I'm unable to delete a folder named '3Minit Download' from the previous user. The folder contains a ton of images that I cannot delete and create a problem when I try to upload my gallery because the photos from the folder update as well, over 300.

My Sig contains the rom I'm on. When I received the phone, I wiped and replaced the image for rooting and flashing purposes. I figured doing so would remove whatever was on the phone but it did not.

I have tried changing the permissions to the folder but I receive the message attached...

Any would would be greatly appreciated. Thanks.

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