Closer and closer...

I now have the multi-SD card functionality worked out which took a while...The SdFat library required to work with more than one is considerably more complex than the SD library I was used to using in the past.  Now that I have that going, I have most of the File IO finished, minus some error checking and over-write protection to keep existing keys from being lost when adding new keys.  Here soon a new video will be posted detailing the rest of the changes and progress.