Deleting files

I bought my K2+ about a month ago & it is printing great. The multi color works amazing. I just have one small question, how do I delete files that I have printed off the unit itself?

The fastest method I use is to go on device tab of CP6 and there you can select the files you want to delete. There is a separate tab for all the Timelapes as well, you need to delete them seperately.