This change helped me to solve my upload issue:
https://forum.opnsense.org/index.php?topic=26602.msg128862#msg128862
https://forum.opnsense.org/index.php?topic=26602.msg128862#msg128862
QuoteIf you have a VLAN but HAVE NOT assigned the parent interface please do so, enable it and then all the hardware features are properly turned off to get your speed back.