
This review is for PNY CS1030 1TB. First of all, the actual space of this drive after formatting to NTFS is 931.5GB. I have 2 other NVME 1TB hard drives. One has the same capacity, the other is larger, around 954GB. I've added a synthetic snapshot of the speed of the crystal disc. It means nothing as we all know. The actual drive speed on my system (Windows 10) was: If you copy large amounts of data to it from another (significantly faster) NVME drive, the speed goes from 1.1 GB/s to 1.6 GB/s to 25 GB. written. After this threshold, the speed gradually decreases to around 300 MB/s until the end of the transfer. If you copy huge amounts of data to it by yourself, the speed is around 800MB/s up to the 25GB write threshold. After that, it drops to the same speed of around 300 MB/s. Those speeds are terrible, lower than even good SATA SSDs. I have 2 other NVME drives of different brands (adata and WD) and neither of them writes data so badly after threshold. The maximum temperature reached by the disc was about 60 degrees Celsius. Data on the hard drive, I recommend buying another hard drive.

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