hi C,
They do have pull ups on the SD Card PCB.
The operation of the hardware is not a problem, its the 'unfit for purpose', Oshonsoft SD IDE compiler, which should never have been released, which is the problem.
As I have said before, I have built/tested and I am using a working data logger, using 'work arounds', that meets my requirements.
I was hoping to post as an Article a full blown logger project, showing all the SD features, but IMHO the project is only fit for 'in house' use.
Eric