Question Nvme and m.2 ssd upgrade

Aug 26, 2019
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I just bought asus tuf fx505dt and wanted to add ssd as there was non when i bought it..
I bought a crucial mx500 m.2 ssd but it was not showing either in bios or drive manager. When i visited a technician he told me that this laptop does not support m.2 but nvme.
Can someone please tell me if its possible and if so how are they different. And a possible solution as well.