Internal drive bay and hot-plug backplane: Up to 10 x 2.5” HDD: SAS, SATA, Near-line SAS SSD: SAS, SATA Up to 4 x 2.5” HDD: SAS, SATA, Near-line SAS SSD: SAS, SATA, Up to 2 NVMe PCIe
Datasheet: R620 spec sheet
1.8TB 10K SAS 12Gb/s 2.5" HDD for Dell PowerEdge Servers | Enterprise Drive in 13G Tray