Sony issued a new A7IV 1.11 firmware update ( Click here to download ).

Benefits and Improvements

WARNING! Make sure that there is only one BODYDATA.DAT file on the memory card. If you have used the card for a previous update, format the memory card in the camera before downloading a new file.

• Improves the shutter reliability
• Fixes an issue where the movie file rotated by the camera may not be rotated when displayed on a computer

Precautions when updating from Ver.1.01 or earlier

• When updating from Ver.1.01 or earlier, you need to update to Ver.1.05 before proceeding with the Ver.1.11 update. Only update to Ver.1.11 after updating to Ver.1.05 . If you try to update to Ver.1.11 without updating to Ver.1.05 , an error will occur and you will not be able to update.
• Follow the instructions below to check the system software version.
  Note: If the Date/Time setting screen appears when you turn on your camera, be sure to set the date and time to the correct values.
  1. On the camera, select Menu .
  2. Select Setup → Setup Option → Version .

If it is already Ver.1.05 or later, please update to the latest system software version.