Additional QOS

Dear All,

I am New to the mikrotik, Please Help me to configure
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We are providing internet service , with that we are having file server,

we want our customers can download contents from file server on high speed,

Example : 1 Mbps(if customer downloading from internet) 10 Mbps(if customer downloading from our file server)

all internet plans are configured on radius server,we want to provide additional 10 Mbps local Bandwidth,

Please help me to configure additional QOS for Local Bandwidth