CF Memory Card - Scan External Device - Corrupted Card

Hello Brian. 
Thank you for contacting AVG Community Support.
I am afraid. AVG cannot corrupt any external device.
Since you have mentioned the issue happend after AVG scan.
I have escalated this to our technical team and they will communicate and assist you further regarding this.
Thank you.

I removed a working CF memory card from my camera … I'd just taken a photo so i know it was OK … connected via a USB interface to my PC to download. The AVG pop-up for scan external device asked did I want to scan … I replied yes … scan replied no external threat … however when i went to download files the card had become unreadable at this point & my PC was asking did a I want to format the card.
I subsequently put the card back in camera … same response. Has this happened to anyone else?
It appears that the AVG scan corrupted the card somehow.

Hello Brian. 
Thank you for contacting AVG Community Support.
I am afraid. AVG cannot corrupt any external device.
Since you have mentioned the issue happend after AVG scan.
I have escalated this to our technical team and they will communicate and assist you further regarding this.
Thank you.