After official upgrade to 10.2.1 get message that media card is encrypted on another device

Please help !
I got a message a few hours ago that there is an update available to my Z10 STL100-1, running on Orange.
I never did a leaked update always waited to get the notification for the official ones.
I have always had my media card (micros sd) encrypted from the beginning and ran through at least 2-3 updates untill now.
After todays update to 10.2.1.537 was finished and rebooted, I got the message that my media card was encrypted in another device and in order to use it I have to go to settings and wipe/format it.
I tried copying the files to PC but they will not open.
Please help, I have some very important photos and files on that card that I need to get back.
How could they do this to me ?

It's not personal.
Did you do a backup before doing the update?
If you've been helped click on , if you've been saved buy the app.
Developer of stokLocker, Sympatico and Super Sentences.

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