How can I create a folder at the root level instead of the sdcards level on my galaxy s6?

[AC Question]

An application tells me to create a MilkVR folder at the root level to load VR movies into but I cannot create the folder on my galaxy s6 -- says insufficient storage when I try to create it and doesn't have an OK button when I try to move a folder to it.

 

[mehigh101]

Welcome to Android Central!
Are you rooted? The root folder is just read,not read n write
Best regards,Mikey. For any more questions,PM me. I hope you found what you were looking for.
Sent from my Samsung Galaxy S7 Edge SM-G935F.