Formated capacity of HGST HMS5C4040BLE640

I’m going to migrate my RAID from Western Digital WD40EFRX to HGST HMS5C4040BLE640. What is a formatted capacity of this device?
For WD40EFRX it is 4,000,787 MB. In HGST data sheet ( I dont’t see actual information.

Best regards.

They mention it in the OEM spec… section 4.1 :

Tnx for your time.