The 870757-B21 is an HPE 9.6TB SAS 12G Read Intensive SFF SC DS SSD, a 2.5-inch small form factor solid-state drive with 9.6TB of SAS-based storage, optimized for read-heavy workloads, featuring a 12Gbps SAS interface and HPE’s Smart Carrier (SC) and Digitally Signed (DS) firmware for enhanced security and management.