For 8 TB looks to be a pretty good deal if you have U.2 on your board to connect it!
WD Ultrastar - 7.6TB DC SN630 NVMe - WUS3BA176C7P3E3 - SSD-7680GB-U.2 PN 0TS1620 | eBay
65% less power consumption compared to 25W PCIe SSD solutions. Z-height (mm) 7.00 +0.2/-0.5. Weight (g, max) 95. Length (mm, max) 100.45.
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