I've been having a look at the KN7000 SD card filing system and made the following observations.

The 8 Megabyte card supplied with the KN7000, when blank, reports in the SD menu as having 6608Kb (6.608Mb) free.
8Mb = 8192Kb : 8192 minus 6608 = 1584Kb So, where has just over 1.5Mb of memory gone?
I then tried the same operation with a 32Mb card (32768Kb) and it reports only 30352Kb (30.352Mb) free!
This time, Missing 2416Kb. So where has just over 2.4Mb of memory gone?

I then tried some comparative tests saving identical data to the 8Mb SD card and then to Floppy Disc.
I named the first Folder using 16 Characters and this reduced the free memory from 6608Kb to 6576Kb - a drop of 32Kb!
The SD card file data was deleted between tests, so all tests started from the '6576KB Free' point.

Test 1 : Save 3Bank Panel Mem, Current Panel and Effects only, naming the file group using 16 Characters for SD.
Results : Free memory now 6504Kb - Operation used 72Kb. Same file arrangement saved to Floppy used 17Kb.

Test 2 : Save 'Perform' option again using 16 Character file group name for the SD card.
Results : Free memory now 6400Kb - Operation used 208Kb. Same file arrangement saved to Floppy used 95Kb.

Test 3 : Save all Custom Styles only again using 16 Character file group name for the SD card.
Results : Free memory now 6520Kb - Operation used 88Kb. Same arrangement saved to Floppy used 205Kb

Test 4 : Save 'Perform' and Custom again using 16 Character file group name for the SD card.
Results : Free memory now 6392Kb - Operation used 216Kb. Same arrangement saved to Floppy used 429Kb

Test 5 : Save 3Bank Panel Mem, Current Panel and Effects only, same data to 10 file groups, each 16 Character name.
Results : Free memory now 6216Kb - Operation used 360Kb. Same arrangement saved to Floppy used 171Kb.
This means that the average space used on the SD card for each operation was 36Kb
compared to 17Kb on Floppy.

Interesting stuff Eh??? The strange result is the large difference when saving Custom Memory. This operation shows a considerable reduction in the required SD memory, compared to that on a floppy disc. All the other operations required more SD memory than floppy space. I repeated Test 3 several times and got the same result every time.

Finally, I continuously transferred data to the 8Mb SD card, from floppy discs until it reported full. Toward the end of the process, I transferred only small files so that I didn't overflow the capacity and get a erroneous result. Having filled the SD card, I then took the floppy discs which I used, and added up the files sizes, using Windows Explorer. The total file size was 6.32Mb.


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Willum