As of 2023 there are many badly performing clones on the market. V2/3GHz NanoVNA uses parts like ADF4350 and AD8342 which are costly and clones have been cutting costs by using salvaged or reject parts.
See official store and look for V2 Plus4/V2 Plus4 Pro versions only to avoid getting a bad clone. We have stopped selling V2.2 versions since October 2020, so all V2 hardware that are not Plus or Plus4 are not made by us and we can not guarantee performance.
Menu map I found talks about SD cards.
I have searched thru my unit, and cant find anything with SD cards. I also opened my Vna and found nothing. I did not disassemble the whole unit.
Sorry for a late response. I just joined this group.
I have a NanoVNA-V2Plus4 from AURSINC on Amazon. As far as I can tell, it is "original" not a clone. I disassembled it just to check out markings, chips, etc. It did have a SD card slot on the back side of the LCD display panel. You have to unplug the panel from the main board to see it. Sort of strange as you cannot access it with the aluminum case on. I have no idea if the firmware actually gives you usage of the slot. I do see that it shows up in NanoVNA-APP. I am using DisLord's latest 1.4.01 firmware and v1.1.218 of theNanoVNA-APP software. I attached a screen shot.
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