A:Answer Mine came with two drives, a 240GB (SATA SSD) that was a Western Digital Green WDS240G2GOA, and a 1TB Seagate Barracuda ST1000DM010 (SATA HDD).
Windows was stored on the 240GB SSD, however, I added a 1TB M.2 NVMe SSD and migrated all the data from the WD drive to the NVMe drive (and made the WD SSD just for extra storage). My reads went from 455 MB/s to 3112 MB/s, and writes from 380 MB/s to 3155 MB/s.