Sony has identified an issue with some SD memory cards from the SF-M series, SF-M series TOUGH specification and SF-G series TOUGH specification.
The issue relates to the VSC mode (Video Speed Class) and recorded footage data on the card may be damaged or may not be recorded optimally.
To address this issue Sony are implementing a free replacement program for affected SD memory cards.
To find out if your SD cards are affected and to arrange a replacement please visit Sony’s support page for this issue in your local country.
When calling you may also be asked for the following:
– Model number
– Full serial number
– Date purchased
– Place purchased
I personally have 5 affected cards 🙁
If you are shooting with the a7III then you can find alternative memory card recommendations in my a7III memory card guide.