Windows 10: Slow M.2 nvme ssd

Hi.I have Lexar NM620 M.2 2280 256GB SSD.Recently when I checked my ssd's read and write speed I noticed a significant performance drop. This is how it used to be a month ago :And this is how it is now :I mean these speeds are not even SATA ssd speeds. Could you help me with this?Thanks.

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cloning sata ssd to m.2 nvme

Hi so i'm planning on building a new pc and my main storage drive on it will be an m.2 nvme and i want to clone my current pc's main sata ssd with my windows install on it to the new pc, I already know how to clone sata ssd to m.2 nvme and keep all my old files and keep windows but i'm wondering if there will be any hardware problems since my new pc will have a completely different motherboard, cpu and gpu, if there is any hardware problems is there anyway to get around it? or would i just have to install windows by itself on the new m.2 nvme and then afterward copy all the files except windows from the old ssd

 

What is the Maximum capacity for M.2 NVMe ssd I can use

Aspire E5-576 Laptop
MS Windows 10 Home 64-Bit (Japanese)

In my laptop there is an option to install M.2 NVMe ssd.

In the market there are M.2 NVMe ssd with various capacity (GB/TB). How do I know what is the maximum capacity for my laptop. My present Hard drive (not SSD) is showing empty space of 324 GB.

Any advice/suggestions/help in this regard will be much appreciated.

Thank you.

 

What is the Maximum capacity for M.2 NVMe ssd I can use

Hi Dave, thank you very much for the quick and easy to understand reply.

Do you think brand name matters when buying M.2 NVMe ssd, also when I search on internet for NVMe M.2 ssd
it has Gen4x4, 3D TLC NAND Gen 3x4, NVMe M.2 Tpe 2280 PCIe Gen3.0x4 what are all these and how to select one?

Thank you.