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uSDcard sector or block handling

Question asked by Werner Meier on Jun 27, 2016
Latest reply on Jun 29, 2016 by Werner Meier
we try to use a uSDcard efficiently to log process Data. This works great. Now we would like to erase certain sectors in order to have a kind of a "ring buffer" for these process Data.
We can't find any documentation for such low level chip handling, (similar to flash handling onchip flash in STM32 chips). Has anyone any experience in this? Or is the controller on a uSDcard "hiding" everything? Erase a file using Fatfs does not really erase anything but just mark something as erased.