I got a new 'phone, with Android 7. I don't like it and plan to continue to use my Android 6 phone.
When I put the SD card into the Android 7, I vaguely remember something about it formatting - and encrypting? - it, and saying that the data would only be accessible on that 'phone.
When I put it in the Android 6 'phone, Settings/Storage and USB says that there is no SD card inserted.
It also offers me the option to "forget" the card and says that if I do so, all data on the card will be lost forever.
Two important points:
I don't care about the data & don't mind losing it; but I don't want the o/s to believe that there is no SD card slot.
the SD card & SIM slide in together on a little tray and that tray is stuck. So, it is quite probable that the SD card is not physically recognized.
Before I use brute force (and a thin knife) to get the tray out, is there any way to tell the 'phone "hey, you might have an SD card which is encrypted, and I am quite happy with reformatting it, just so long as you recognize it"?