Im not sure how you meant to fix this problem. Can you break it down to me please. Im having this problem now.
All of the folders you mentioned are showing the 777 as a size im assuming. Please advise
Warning: Unknown(): write failed: No space left on device (28) in Unknown on line 0
Warning: Unknown(): Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp) in Unknown on line 0