Half the space of the drive I ordered

My Western Digital RE3 WD1002FBYS 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive only shows 221 GB. I activated it through computer management, and have plugged it in to my motherboard’s sata 2 port with a 6tb/sec sata cable. Any help on how to get this drives capacity back up to 1tb would help. Thanks.

Try clear the bios or maybe there is unused place and try other softwares to format the disk