To Box.com Forum:
I constantly get the message that my storage capacity is almost full when that is NOT the case at all. Hence, it extremely limits the upload capacity.
See below Box.com's response to a forum member who had this same problem:
"Welcome to the Box Community!
I'm sorry for the confusion. Let me help.
I ran a script to fix the file size count in your used storage and should be seeing the right file size count.
Best,"
Please correct this annoying problem as you did for that person.. Thanks.