USB 3.0 ports are slightly smaller than other USB connections, so if the port appears to be the wrong size, it is likely that the port belongs to a different form factor. This can be caused by a number of factors, such as the device being too old to support USB 3.0, or the device not having a USB 3.0 port in the first place.

"Identify the problem. * Question user and identify user changes to computer.* Perform backups before making changes.* Inquire regarding environmental or infrastructure changes.* Review system and application logs.
2.Establish a theory of probable cause (question the obvious and if necessary, conduct internal or external research based on symptoms)