When should CF and MMC/SD cards be formatted?
Data and files on memory cards should simply be copied, moved or deleted, and it should not be necessary to format cards. The manufacturers of memory cards optimise cards for the fastest read/write speed, so that they work well with digital cameras. The same is applicable to VBOX’s. However Windows based format routines are designed to optimise memory cards for the most efficient use of memory space and not access speed. If you do need to format the CF or SD card please check the format type, this should be stated in the VBOX manual.