I’m more concerned about the cause, as it has happened to me, using the SONY Memory Stick Pro HG adapters.
The “Restore” the card you put it in the camera, and flip the power switch to media (not camera). You are offered the choice to restore the card there. Then the card works and I think your footage is restored, or most of it.
I don’t understand the cause, two adapters and two memory stick Pro HG cards and this has happened to both. Hasn’t happened to the SxS cards.
Steven Gladstone
https://www.gladstonefilms.com