Android formats External SD upon connection

[ShaneTKO]

I recently bought an Anker USB C 2 in 1 memory card reader. Great device, plug reader into Android device, insert memory card and user can copy/paste/delete files. Very convenient. It was working great, but all of a sudden as soon as I insert a memory card, Android formats the card. I've tested this on Samsung S8+, 10+, and a Samsung Tablet.
I tried inserting the micro SD into a regular SD adapter and then inserting reader into device with 'lock' set. The result: Nothing. Android does not read the card.

Any ideas?

 

[MoodyBlues]

Any ideas?

I hate to say it, but everything points to a failure--a catastrophic failure.

You've already done everything I would've suggested. Perhaps someone else will have other suggestions.