This menu does not allow you to change any parameters, but only displays information about the storage medium. Pressing the start/enter button again allows the memory card to be deleted, but only after confirmation is requested by pressing the start/enter button again.

further messages:

xx entries Number of entries on the memory card (each measurement until interruption generates an entry)
xxx KB free Size of the free memory space in kilobytes

The following error message relates to measuring/saving:

Write protection Write protection of the memory card is switched on
no S. card The device has not recognised a memory card
Directory full More than 64 entries have been made. The memory card should now be removed, read out and deleted
Card is full The memory card should now be removed, read out and deleted