Western Digital 1TB WD Red SN700 NVMe Internal Solid State Drive SSD for NAS Devices - Gen3 PCIe, M.2 2280, Up to 3,430 MB/s - WDS100T1R0C

Works great - far more cost effective than Synology certified devices.

Ive purchased a number of WD Red SATA drives 4/TB and was happy with them, so I decided to take the plunge on the WD Red NVME 4/TB drives, too. Not the most expensive option, but it offers the highest TBW rating of any 4TB drives but a huge margin. I have these running in my QNAP NAS U.2 slots for higher throughput I/O for an ESXi Home Lab offering up iSCSI LUNS and CIFS volumes. Having lost a number of hard drives over the years to the dreaded 3year death grip Im always looking to purchase higher quality HDDs (WD Black) and higher quality SSDs (WD Red). Thank you Western Digital for offering the higher quality products.

On my home NAS, which gets fairly heavy use, a pair of these gave me a nice R/W speed enhancement via SSD Cache. Very happy with the performance.

Great for NAS cache. works fine on my TS-673A Raid 0 cache storage (read only)

This went into a Synology NAS just fine. The Synology OS will throw an uncertified error your way to try and persuade you to buy their own brand...but it will work fine. Hit rate to the SSD is very high, so it is definitely accelerating things in workloads.