Re: Is my only options to connect the SSD to the SATA connector and then connect the hard drive as an external  drive via USB? Or else purchase a new M2 SSD and connect my 2Tb hdd to the SATA port. correct the motherboard has two one sata port but one reserved for odd.  the trend is shifting towards single large slower sata hdd + bootable M.2 NVME ssd. you can install a second 2.5' sata ssd/hdd in place of odd using a laptop second hdd adapter. just make sure the adapter has same connectors as stock odd (thin profile). there is no hdd caddy. 3.5" hdd directly mounted to chassis wall. [IMAGE]  
I am considering purchasing the Inspiron 3881 as it comes with I3-10100 and looks like the motherboard will support 11th gen Intel CPUs, it has two display ports, plenty of USB ports and a good price. I was planning to install my existing 1tb Samsung sata SSD and 2 tb, 3.5" hard drive but it seems that the 3881 only supports one SATA drive. Is this actually the case? Is my only options to connect the SSD to the SATA connector and then connect the hard drive as an external  drive via USB? Or else purchase a new M2 SSD and connect my 2Tb hdd to the SATA port. The info page seems to infer that only one port can be used at a time - which seems unlikely but best for me to check before making a final purchase decision. Also just to be sure - can the HDMI and Display ports  both be used at the same time.
Inspiron 3881. Using my Samsung 1TB SATA SSD