Synology ecosystem match; recheck the exact row
DS925+ + 3 × 12TB Plus Series
A checked starting combination targeting about 24TB usable with shr / raid 5-style single-drive redundancy.
Lowest checked total$2,139.96B&H + Newegg
Lowest one-store total$2,229.96B&H
Approx. usable24TB
Checked value$89.17/TB
What the bundle contains
Capacity and redundancy
The three-drive pool can continue after one drive fails and leaves one bay open; keep an independent backup of originals.
Approximation: $(3 - 1) × 12TB = 24TB$. Filesystem formatting, system partitions, snapshots, and RAID implementation reduce displayed free space.