Hi Alodine,
Correct.
If you need to format the SD cards of multiple cameras, the fastest and most convenient way is to use MOBOTIX MxManagementCenter (MxMC) instead of formatting each camera individually via its web interface.
This functionality has been available since MxMC Version 2.7.1 and is continuously maintained. It also supports formatting the SD cards of the latest MOBOTIX ONE camera models.
You can find more information here:
Download Link of the MxMC:
I hope this helps.
Best regards,
Jörg