MZ-7KE512 · 2.5-inch · SATA 6 Gb/s · 3D V-NAND MLC (2-bit)
Used, pulled from service and fully tested — 99% SMART health. Total host writes are 11.57 TB against a 300 TBW endurance rating — about 3.9% of the flash endurance consumed. The drive logged 32,995 power-on hours (roughly 3.8 years of always-on service) with 0 reallocated sectors, 0 uncorrectable errors and 0 interface CRC errors, and passed a full Extended SMART self-test on 2026-11-11.
Data has been securely erased. A full ATA Secure Erase was performed; the drive was re-partitioned only to run the benchmark and then verified blank again. Nothing recoverable remains on it.
About the photos: Photos 1 and 2 are representative images of another 850 PRO 512GB from the same batch (its serial number is blacked out). The specific drive you will receive is not pictured; it is in good cosmetic condition with an intact label, and photo 3 is the CrystalDiskMark benchmark run on this exact drive. You will receive serial number S2BENCAHB15080Y.
| Model | MZ-7KE512 |
| Capacity | 512 GB |
| NAND type | Samsung 3D V-NAND MLC (2-bit) |
| Interface | SATA 6 Gb/s (SATA III) |
| Form factor | 2.5-inch, 7 mm |
| Sequential read / write | Up to 550 / 520 MB/s |
| Endurance rating | 300 TBW |
| Serial number | S2BENCAHB15080Y |
CrystalDiskMark 9.0.3 (1 GiB, 5 passes) run on this drive on 2026-11-11 — photo 3: sequential 554.3 / 517.8 MB/s read/write; random 4K Q32T1 347.8 / 330.3 MB/s; Q1T1 23.1 / 88.7 MB/s.
The 850 PRO was Samsung's flagship SATA SSD, built with durable 2-bit MLC V-NAND — far more write endurance than the TLC drives that replaced it. A favorite for workstations and home servers. Works with Windows, macOS and Linux.
Sold by NerdHouse LLC, a Hawaii-based IT managed services provider. Questions before you buy are welcome — message us and we will answer.