I have a 6 year old Dell XPS 13 L321X and didn't want to delete Win 7 to install Win 10 just in case Win 7 under XPS 13 is better is as Win 10 So I bought Zheino mSATA for this purpose. I swapped out the SSD and installed Win 10 on the Zheino SSD and the drive worked great. The speed corresponded to the declared one (read 500 MB/s, write 450 MB/s). There is another version of the same drive with a write speed of 120 MB / s - this is M1 mSATA. My drive is M3 mSata so make sure you have an M3 model. On the XPS 13 L321X, Win 7 is definitely better - the fan is quiet and fast. Win 10 is fast too, but you won't notice any difference, except that the fan noise is much louder and more noticeable. Zheino also updated his website, some people still visit the old one which has no updates and support. Their new website is zheinossd.com. In general I am very satisfied.
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