Why isn't W10 file explorer able to see my Sandisk CF Express card reader, but it did previously?

[Allan Kelly1]

I have a SD CFE card reader with USB-C but connect it to my W10 laptop via an adaptor to USB 2 or 3 - I've tried both on the laptop. I cannot see or access it in file explorer.It previously worked fine repeatedly but I can no longer see it in file explorer. The reader and card work fine on my ipad Pro via USB-C.When I connect/disconnect the reader (with a card inserted) to the laptop it makes the usual 'device' connected/disconnected sound and the reader (power?) light comes on. I can also see on the toolbar that I can disconnect it. All of this only happens when there's card in the reader.

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