1. Go to settings
2. Phone Storage
3.Phone
4.Temp Files
5. Delete
After you hit delete it will say Deleting temporary files, this is a background task that may take a while but check back in a bit and you should see some space recovered.If the files in your question are in temp files it should get rid of them. I went from 171mb of temp files to 69mb of temp files. But you can't specify what temp files are being deleted. Of course you can use storage check, or Lumia storage check to try an delete them; but I found the Phone Storage works the best. It has helped me keep my other storage below 500mb for the past six months as well as reducing temp files. From what I hear 8.1 has some new things that even helps more. As my phone is still in warranty I am waiting for the over the air release before I move to 8.1. Been very happy with 8.0 anyway. But I have a 64GB sd card in my SD slot so it will be nice when 8.1 is pushed out and you can load apps onto the SD card. As it is I have all my music, photos, maps and movies on my SD card and even withover 40 apps in phone storage I still have 4.7GB free.