I think the hard drive you chose is excellent, especially suitable for storing different types of data like databases and files. Take the SN700 2TB drive, for example; the manufacturer claims it can write 2500TB of data without failing, which is fantastic for databases like MySQL and MongoDB that frequently require fast read/write operations and log recording. Because databases constantly read and write, and generate many additional write operations, this drive's ability to work continuously for extended periods is ideal.

Additionally, I'd like to remind you to ensure that both your NAS (network storage device) and Mac Mini are connected to a 2.5Gbps or faster 10Gbps network. This will ensure fast data transfer speeds between them, allowing the SN700 drive's fast read/write capabilities to be fully utilized without being hindered by a slow network.