Internal drive bay and hot-plug backplane: Up to 16 x 2.5” HDD: SAS, SATA, Near-line SAS SSD: SAS, SATA Up to 8 x 3.5” HDD: SAS, SATA, Near-line SAS SSD: SAS, SATA
Datasheet: R720 spec sheet
3.2TB 3D TLC SAS 24Gb/s 2.5" SSD for Dell PowerEdge Servers | Enterprise Drive in 13G Tray