SAP oracle Database physical hard disk size is full

Sir,

SAP oracle Database physical hard disk size is full please provide a solution how i Extended the hard disk .

Physical hard disk storage size is:273 GB

Occupied Space is :265 GB

Free Space is : 6 GB

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SAP table space is almost 95 % is used .

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Our Hard disk have RAID 5 is configured .

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Please provide a solution how i solved this .