This SSD hard drive has a 400 GB storage capacity and works faster than an HDD drive. This model has an M.2 form factor.
From ServersPlus
SYNOLOGY Synology SNV3410 - SSD - 400 GB - internal - M.2 2280 - PCIe 3.0 x4 (NVMe)
This product is also available at 2 unverified stores.